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         Cubital Tunnel Syndrome:     more detail
  1. Cubital Tunnel Syndrome - A Medical Dictionary, Bibliography, and Annotated Research Guide to Internet References by ICON Health Publications, 2004-09-20
  2. 21st Century Complete Medical Guide to Cubital Tunnel Syndrome, Elbow Injuries and Disorders, Ergonomics and Workplace Musculoskeletal Disorders, Authoritative ... for Patients and Physicians (CD-ROM) by PM Medical Health News, 2004-04-01
  3. 21st Century Ultimate Medical Guide to Cubital Tunnel Syndrome - Authoritative Clinical Information for Physicians and Patients (Two CD-ROM Set) by PM Medical Health News, 2009-04-10
  4. New test helps detect carpal, cubital tunnel syndromes.(Rheumatology): An article from: Internal Medicine News by Patrice Wendling, 2006-04-15
  5. Overcome Carpal Tunnel Syndrome by Bourdin LeBock, 2010-03-12

1. Cubital Tunnel Syndrome, Ulnar Nerve Entrapment At The Elbow, Nerve Entrapment P
A Patient's Guide. to. cubital tunnel syndrome. The information contained within these pages is the property of the
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Cubital Tunnel Syndrome Michael Bermant, MD
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Home The Problem
Nerve compression problems behind the elbow are called cubital tunnel syndrome. The ulnar nerve passes through the cubital tunnel which is a bony passageway. When you "hit your funny bone" and have tingling in the small and ring fingers, you are hitting the ulnar nerve at the cubital tunnel. The tunnel has a bone passageway on both sides and the base. A ligament holds the nerve into the tunnel by crossing from one bone to the other. The ulnar nerve controls muscles used for gripping, primarily of the little, ring, and sometimes middle fingers. It also controls muscles in the hand used for strong pinch, and other muscles that coordinate fine movements. This includes most of the muscles in the hand except two muscles that lift the thumb up and out of your palm, turning the thumb into a better position for pinching. The ulnar nerve also receives feeling from the small and ring fingers from both the palm and backside of your hand.

2. CTD: Cubital Tunnel Syndrome
Hand Surgery Center of Staten Island and Brooklyn, New YorkMukund Patel, M.D., F.A.C.S. The early symptoms of cubital tunnel syndrome usually respond to stopping the activity that is causing the symptoms.
http://www.handsurgeon.com/cubital.html
of Brooklyn and Staten Island "Failure is not an option"

Cubital Tunnel Syndrome
What is cubital tunnel? C ubital tunnel is behind your "funny bone" on the inside of your elbow. Behind the funny bone (medial epicondyle), the tunnel is formed by the bone surrounded by muscles and ligaments. The ulnar nerve passes through the cubital tunnel on its way from the arm to the forearm and hand. What is a syndrome? A syndrome is a combination of symptoms and physical findings that characterizes a certain disease. What is cubital tunnel syndrome? C ubital tunnel syndrome is pressure on the ulnar nerve behind the funny bone causing numbness and tingling in the ring and small fingers of the hand.
What Causes Cubital Tunnel Syndrome?
I n normal subjects, bending the elbow causes the nerve to stretch several millimeters. When this is done repeatedly for activities that require repeated bending and straightening of the elbow in the workplace, the nerve becomes irritated and inflamed. In other patients, the nerve shifts and actually snap over the prominence of the medial epicondyle. This snapping motion stretches and irritates the nerve. Leaning on the elbow, or resting the elbow on an elbow rest during a long distance drive or running machinery may cause repetitive pressure and irritation on the nerve. A direct hit on the tunnel may damage the ulnar nerve.
Symptoms
Early signs are numbness on the inside of the hand and in the ring and little fingers. Later there is weakness of the hand. There may be pain at the elbow. Tapping on the nerve as it passes through the cubital tunnel causes tingling or electric shock sensation down to the small finger.

3. Cubital Tunnel Syndrome
What is cubital tunnel syndrome? Cubitus is Latin for elbow. The cubital tunnel is an anatomic passageway between the
http://www.indianahandcenter.com/med_cutnl.html
What is Cubital Tunnel Syndrome?
Cubitus is Latin for elbow. The cubital tunnel is an anatomic passageway between the bony prominence of the inside of the elbow (medial epicondyle) and the tip of the elbow (olecranon process). Through this passageway travels the ulnar nerve as it crosses behind the elbow. To keep the nerve from displacing with motion of the elbow, the tunnel is completed by a covering of tissue called fascia. There is an entrance to the tunnel formed by the medial intermuscular septum and another covering layer of fascia called the arcade of Struthers. The exit of the tunnel is created by the two muscle origins of the flexor carpi ulnaris.
Cubital tunnel syndrome occurs when there is compression or injury of the ulnar nerve in the cubital tunnel. Although shielded from injury from the sides by the medial epicondyle and olecranon, the ulnar nerve is only superficially covered by a soft tissue between these bony prominences. In most individuals, the ulnar nerve is easily felt about the cubital tunnel. Anyone who has ever struck their "funny bone" knows how easily the ulnar nerve may be affected by direct injury. Your Indiana Hand Center physician will be able to demonstrate the anatomy to you on your own elbow.
What are the Causes?

4. Cubital Tunnel Syndrome - Shoulder
cubital tunnel syndrome. The funny bone is actually a nerve on the inside of the elbow that runs in a passage called the
http://www.soarmedical.com/medical-library/elbow/cubital-tunnel

CUBITAL TUNNEL SYNDROME
The funny bone is actually a nerve on the inside of the elbow that runs in a passage called the cubital tunnel! Sometimes this area becomes irritated, leading to a condition called cubital tunnel syndrome.
Anatomy
Same image as above, but without the body . This image is labeled. Beginning at the side of the neck, the ulnar nerve (above) travels through the arm pit, down the arm to the hand and fingers. At the inner portion of the back of the elbow, the ulnar nerve passes through a tunnel of muscle, ligament and bone - the cubital tunnel (below). The nerve ends (right) in the hand, supplying feeling to the pinky and half the ring finger. In addition, these nerves cause movement in the small muscles of the hand. The picture at right is also available without muscles
Causes There are several possible causes of cubital tunnel syndrome. Frequent bending of the elbow such as pulling levers, reaching, or lifting are common sources of problems. Even anatomy may play a role. The ulnar nerve actually stretches several millimeters when the elbow is bent. Sometimes the nerve will shift or actually snap over the bony medial epicondyle (.flc aniamtion) causing irritation.

5. SCOI Presents Cubital Tunnel Syndrome
cubital tunnel syndrome is a pinched nerve at the elbow commonly known as the "funny bone".
http://www.scoi.com/cubital.htm
Cubital tunnel syndrome is a pinched nerve at the elbow commonly known as the "funny bone". This might be caused by trauma or repetitive use of the elbow and may be caused by continuous use of the elbow in a flexed position. This causes the nerve to become stretched and irritated as opposed to when the arm is extended and the nerve is in a relaxed position. The diagnosis can be confirmed with electrodiagnostic testing including nerve conduction velocity and the electromyogram. Nerve conduction velocity studies, the speed of the nerve across the elbow, will be slowed when there is nerve compression and electromyogram studies, the innervation of the muscles, might be affected by the pinched nerve. For this problem there are three modes of treatment; no treatment, conservative, and surgical. Unfortunately with conservative treatment, only splinting with the arm in an extended position has been found to be helpful. Night time splinting is achieved with a custom made long arm splint that the patient will wear at night time and as often as possible during the day. Unfortunately it is cumbersome to keep the arm out straight all the time and therefore this is usually used only at night. If the patient has persistent complaints despite conservative treatment surgery would be recommended. There are three types of procedures, one is to cut the medial epicondyle which is the bone pinching the nerve or the other two operations are to actually move the nerve out of the cubital tunnel either above or below the muscles of the forearm. This can be performed as an outpatient procedure with an axillary block where only the arm is put to sleep and it has a high success rate.

6. EMedicine - Cubital Tunnel Syndrome : Article By James R Verheyden, MD
common compressive neuropathy (after carpal tunnel syndrome). cubital tunnel syndrome affects men 38 times as often
http://www.emedicine.com/orthoped/topic479.htm
(advertisement) Home Specialties CME PDA ... Patient Education Articles Images CME Patient Education Advanced Search Link to this site Back to: eMedicine Specialties Orthopedic Surgery Elbow
Cubital Tunnel Syndrome
Last Updated: December 18, 2002 Rate this Article Email to a Colleague Synonyms and related keywords: compressed ulnar nerve, ulnar nerve compression, ulnar nerve neuropathy at the elbow, numb finger, compressive neuropathy AUTHOR INFORMATION Section 1 of 10 Author Information Introduction Indications Relevant Anatomy And Contraindications ... Bibliography
Author: James R Verheyden, MD , Fellow in Hand Surgery, Department of Orthopedics and Sports Medicine, University of Washington Coauthor(s): Andrew K Palmer, MD , Chair, Professor, Department of Orthopedics, State University of New York-Upstate Medical University James R Verheyden, MD, is a member of the following medical societies: American Academy of Orthopaedic Surgeons Editor(s): Mark D Lazarus, MD , Associate Professor of Orthopedic Surgery, Medical College of Pennsylvania-Hahnemann University, Chief of Shoulder and Elbow Service, Department of Orthopedic Surgery, Hahnemann University Hospital; Francisco Talavera, PharmD, PhD

7. MMG - Patient Education Cubital Tunnel Syndrome
From Medical Multimedia Group. Describes the anatomy, symptoms, prevention, and treatment of this Category Health Conditions and Diseases Cubital Tunnel......A Patient's Guide to cubital tunnel syndrome. Introduction. cubital tunnel syndromeis a condition that affects the ulnar nerve where it crosses the elbow.
http://www.medicalmultimediagroup.com/pated/ctd/cubtun/cubun.html
A Patient's Guide
to
Cubital Tunnel Syndrome Web Resources Available
Introduction
Cubital tunnel syndrome is a condition that affects the ulnar nerve where it crosses the elbow. The symptoms are very similar to the pain that comes from hitting your funny bone . The funny bone is actually the ulnar nerve on the inside of the elbow that runs in a passage called the cubital tunnel! Sometimes this area becomes irritated from repeated injury or pressure, leading to a condition called cubital tunnel syndrome.
Anatomy
The ulnar nerve actually starts at the side of the neck, where the individual nerve roots exit the spine through small openings between the vertebra called foramen . The nerve roots then join together to form three main nerves that travel down the arm to the hand. The ulnar nerve is one of those nerves. After leaving the side of the neck, the ulnar nerve then travels through the arm pit, down the arm to the hand and fingers. At the inner portion of the back of the elbow, the ulnar nerve passes through a tunnel of muscle, ligament and bone - the

8. CTD: Cubital Tunnel Syndrome
cubital tunnel syndrome. Introduction. cubital tunnel syndrome is a conditionthat affects the ulnar nerve where it crosses the elbow.
http://www.medicalmultimediagroup.com/pated/ctd/cubtun/cubtun.html
Cubital Tunnel Syndrome A Patient's Guide
to
Cumulative Trauma Disorders

TPlease feel free to print, download, and use/distribute this information (as long as you are not reselling it in any form) . Remember, it is the property of the Medical Multimedia Group and they retain all rights regarding its educational content, graphics, and animation's. If you would like to discuss licensing agreements for using MMG's content in your products, contact mmg@sechrest.com This material does not constitute medical advice. It is intended for informational purposes only. NO ONE ASSOCIATED WITH MEDICAL MULTIMEDIA GROUP WILL ANSWER MEDICAL QUESTIONS VIA EMAIL. Please consult a physician for specific treatment recommendations.
Web Resources Available
Introduction
Cubital tunnel syndrome is a condition that affects the ulnar nerve where it crosses the elbow. The symptoms are very similar to the pain that comes from hitting your funny bone . The funny bone is actually the ulnar nerve on the inside of the elbow that runs in a passage called the cubital tunnel! Sometimes this area becomes irritated from repeated injury or pressure, leading to a condition called cubital tunnel syndrome.

9. Guyon's Canal Syndrome
Concise description, symptomology and treatment information by Mukund Patel, MD, of the Hand Surgery Category Health Conditions and Diseases Guyon s Canal...... What Causes cubital tunnel syndrome? Pressure on the ulnar nerve in theGuyon's canal is usually caused by a cyst in the canal, clotting
http://www.handsurgeon.com/guyon.html
of Brooklyn and Staten Island "Failure is not an option" What is Guyon's Canal?
O n the palm, the ulnar nerve passes under a ligament between two small wrist bones, the pisiform and hamate. The tunnel formed by the bones and ligaments is called Guyon's canal. The Ulnar Nerve supplies sensation to the little finger and half of the ring finger. It is critical that the area of compression be localized to either the wrist (Guyon's canal), or the elbow (cubital tunnel), or the neck (thoracic outlet syndrome, cervical radiculopathy) by physical examination and electrical studies prior to embarking on a treatment. All three may cause numbness and tingling in the same ring and small fingers. What is a syndrome?
A syndrome is a set of symptoms and physical findings that point to a certain diagnosis. All the symptoms and physical findings are not always present.
Various symptoms and physical findings may be present in different grades of severity. What is Guyon's Canal syndrome?
G uyon's Canal syndrome is numbness and tingling in the ring and small fingers caused by irritation of the ulnar nerve in the Guyon's canal.

10. Cubital Tunnel Syndrome
I am told the. diagnosis is cubital tunnel syndrome. I have tried
http://dem0nmac.mgh.harvard.edu/neurowebforum/GeneralFeedbackArticles/cubitaltun
cubital tunnel syndrome
This article submitted by on 9/23/96.
Author's Email:
I have a procedure called anterior transposition of the
ulnar nerve at the elbow scheduled. I am told the
diagnosis is Cubital Tunnel Syndrome. I have tried
to find information about the diagnosis and the
treatment. There is more than enough written about
Carpal Tunnel but not much on Cubital. Is surgery my
only option? I have no idea what may have caused
this. I am a "stay at home" mom. I have had a nerve
conduction velocity test and was told the nerve is completely blocked at the elbow. I would like to know if this surgery is necessary, what is the likelihood I will regain feeling and strength in my 4th and 5th digits. Will the degeneration increase? Since I don't know what caused this, is a more conservative form of treatment even possible? I was referred to an orthopedic surgeon. I would appreciate any information about this condition. Bonnie Next Article Previous Article Return to Topic Menu
Here is a list of responses that have been posted to this article...

11. Cubital Tunne Syndrome In Guitarists
Physician provides information and advice for the guitarist with left forearm pain.Category Health Conditions and Diseases Cubital Tunnel......cubital tunnel syndrome in Guitarists. cubital tunnel syndrome beginswith pain in the elbow area, along the inner side of the forearm.
http://www.museweb.com/ag/cubital.html
Cubital Tunnel Syndrome in Guitarists
by Timothy J. Jameson, D.C., C.C.S.P.
A common problem among both acoustic and electric guitar players is the development of left forearm pain. This column will expand upon a specific type of injury, cubital tunnel syndrome, which affects mostly the inner side of the forearm and the pinky side of the hand. This syndrome is probably not familiar to most guitarists, so I'll discuss the typical pain patterns associated with it. Cubital Tunnel Syndrome begins with pain in the elbow area, along the inner side of the forearm. The pain can travel downwards towards the pinky, and can be accompanied by tingling or numbness sensations to the pinky side of the hand. The forearm muscles can be painful, and can lead to a misdiagnosis of tendonitis by an inexperienced doctor. This syndrome will usually only involve the ring and pinky fingers, since these fingers receive their nerve supply from the ulnar nerve . If the syndrome progresses, it can cause decreased function of the hand, especially grip strength. Wasting or atrophy of the pad of muscles on the palm side below the pinky finger can develop as well. Typically, the person notices that flexing the forearm tends to irritate the symptoms. The culprit in this syndrome is compression of the ulnar nerve. Just south of the elbow, the nerve passes through the

12. Cubital Tunnel Syndrome
Patient information from HandWorld site, covering causes, symptoms, selfcare, and medical/surgical Category Health Conditions and Diseases Cubital Tunnel......What is it? cubital tunnel syndrome is the effect of pressure on theulnar nerve, one of the main nerves of the hand. It can result
http://www.eatonhand.com/hw/hw007.htm
sub print olecmd = 6 ' Print Command oleparam = 1 on error resume next WB.ExecWB olecmd, oleparam if err.number then if DA then ' IE4 - User Cancelled alert "Nothing was printed." else ' IE3 - Other Instructions handle_error end if end if end sub What is it? Cubital tunnel syndrome is the effect of pressure on the ulnar nerve , one of the main nerves of the hand. It can result in a variety of problems, including pain, swelling, weakness or clumsiness of the hand and tingling or numbness of the ring and small fingers. It also often results in elbow pain on the side of the arm next to the chest. What caused it?
  • Like a telephone cable, the ulnar nerve is a connection between the spinal cord and muscles of the forearm and hand as well as the skin on the pinkie side of the hand. The ulnar nerve passes across the back of the elbow, behind a bump on the inner side of the upper arm bone. This bump is called the medial epicondyle. The "funny bone" is actually the corner of the nerve as makes the bend around the elbow. Hitting the elbow at this spot tickles the nerve and gives a brief feeling of a shock or tingling. When the elbow is bent, the nerve may be stretched and push against the bony bump.

13. Cubital Tunnel Syndrome
cubital tunnel syndrome Ulnar nerve entrapment at the cubital tunnel in the elbow Loss of sensation, numbness, tingling, muscle atrophy
http://www.usenix.org/events/lisa98/invited_talks/okamoto_html/tsld026.htm
Cubital Tunnel Syndrome
  • Ulnar nerve entrapment at the cubital tunnel in the elbow
  • Loss of sensation, numbness, tingling, muscle atrophy
Previous slide Next slide Back to first slide View graphic version

14. Cubital Tunnel Syndrome Discussion
cubital tunnel syndrome Discussion. cubital tunnel syndrome resultsfrom a combination of local pressure and stretching the ulnar
http://www.eatonhand.com/dis/dis043.htm
Cubital tunnel syndrome Discussion
Discussion Home Page e-Hand Home Page

15. SPINE-HEALTH | Common Causes | Cervical Disc
Information on cubital tunnel syndrome, also called ulnar nerve compression syndrome.Category Health Conditions and Diseases Cubital Tunnel......Overview. cubital tunnel syndrome. cubital tunnel syndrome is not as common as carpaltunnel syndrome, and generally does not require surgical intervention.
http://www.spine-health.com/topics/cd/overview/cervical/cerv06_3.html
Introduction Common causes Conservative care Surgery ... Introduction Cervical spine: Common conditions: Disc herniation Cervical foraminal stenosis Cervical stenosis with myelopathy Cervical osteoarthritis ... Cervical degenerative disc disease Miscellaneous causes: Rotator cuff tendinitis Brachial plexus Carpal tunnel syndrome Cubital tunnel syndrome Occipital neuralgia Reflex sympathetic dystrophy Related information: Carpal tunnel syndrome Overview
Cubital tunnel syndrome
Also called Ulnar Nerve Compression Syndrome, this condition is caused by compression (pinching) of the ulnar nerve as it passes through the cubital tunnel in the arm (elbow). This will produce numbness in the ring and little finger. In severe cases, weakness of the hand muscles and the wrist flexor on the side of the arm may be present.

16. EMedicine - Cubital Tunnel Syndrome : Article Excerpt By: James R Verheyden, MD
Excerpt from cubital tunnel syndrome. Synonyms, Key neuropathy. Please clickhere to view the full topic text cubital tunnel syndrome. History
http://www.emedicine.com/orthoped/byname/cubital-tunnel-syndrome.htm
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Excerpt from Cubital Tunnel Syndrome
Synonyms, Key Words, and Related Terms: compressed ulnar nerve, ulnar nerve compression, ulnar nerve neuropathy at the elbow, numb finger, compressive neuropathy
Please click here to view the full topic text: Cubital Tunnel Syndrome
History of the Procedure: Feindel and Stratford first used the term cubital tunnel. They emphasized that the ulnar nerve is compressed at the elbow because of anatomic peculiarities to that region. In 1898, Curtis performed the first published case of management for ulnar nerve neuropathy at the elbow, which consisted of a subcutaneous anterior transposition. Problem: Affected patients often experience numbness and tingling along the little finger and the ulnar half of the ring finger. This discomfort often is accompanied by weakness of grip and rarely by intrinsic wasting. Frequency: The elbow is the most common site of compression of the ulnar nerve. Cubital tunnel syndrome is the second most common compressive neuropathy (after carpal tunnel syndrome). Cubital tunnel syndrome affects men 3-8 times as often as women. Etiology: Cubital tunnel syndrome may be caused by constricting fascial bands, subluxation of the ulnar nerve over the medial epicondyle, cubitus valgus, bony spurs, hypertrophied synovium, tumors, ganglia, or direct compression. Work may aggravate cubital tunnel syndrome secondary to repetitive elbow flexion and extension. Certain occupations are associated with the development of cubital tunnel syndrome; however, a definite relationship with occupational activities is not well defined.

17. Orthopedics - Cubital Tunnel Syndrome - Methodist Health Care System, Houston, T
cubital tunnel syndrome. What is cubital tunnel syndrome? Cubital tunnelsyndrome What causes cubital tunnel syndrome? cubital tunnel syndrome
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Cubital Tunnel Syndrome What is cubital tunnel syndrome?
What causes cubital tunnel syndrome? Cubital tunnel syndrome occurs when the ulnar nerve, which passes through the cubital tunnel (a tunnel of muscle, ligament, and bone) on the inside of the elbow, becomes irritated due to injury or pressure. The condition may occur when a person frequently bends the elbows (such as when pulling, reaching, or lifting), constantly leans on the elbow, or sustains a direct injury to the area. What are the symptoms of cubital tunnel syndrome? The following are the most common symptoms of cubital tunnel syndrome. However, each individual may experience symptoms differently. Symptoms may include:
  • numbness in the hand and/or ring and little finger hand pain hand and thumb clumsiness due to muscle weakness
How is cubital tunnel syndrome diagnosed?

18. Cubital Tunnel Syndrome
cubital tunnel syndrome (aka ulnar neuritis) is compression of the ulnar nerve atthe level of the elbow. Q What are the symptoms of cubital tunnel syndrome?
http://www.handsurgerynorthjersey.com/MedicalProblems/CubitalTunnel.asp
Cubital tunnel syndrome (aka ulnar neuritis) is compression of the ulnar nerve at the level of the elbow. The ulnar nerve is one of the two major nerves of the hand that provides sensation to the small finger and a portion of the ring finger. More importantly, the ulnar nerve controls many small muscles in the hand itself. These muscles are important in controlling fine movements of the hand and fingers. Q: What are the symptoms of Cubital Tunnel Syndrome?
A:
The symptoms of cubital tunnel syndrome may be vague, however commonly include numbness and tingling of the ring and small fingers, weakness of grip, a clumsy feeling in the hand as well as an aching feeling in the hand and elbow. Q: What causes Cubital Tunnel Syndrome?
A:
Cubital tunnel syndrome is caused by compression of the nerve behind the "funny bone" of the elbow. It is usually a combination of pulling and actual pressure on the nerve. Cubital tunnel syndrome may also be caused by old injuries to the elbow that leave the bones bent and the nerve stretched. Q: WHow is the diagnosis made?

19. Dynomed
CMC Arthritis, 806900100235, VHS, $19.95, cubital tunnel syndrome, He2346298U,VHS, $19.95, Hand, Wrist, Elbow Shoulder cubital tunnel syndrome.
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20. Entrapment Of The Ulnar Nerve - DynoMed.com
Return 5 Records. cubital tunnel syndrome, What is cubital tunnel syndrome? Entrapmentof the ulnar nerve is also known as cubital tunnel syndrome.
http://www.dynomed.com/encyclopedia/encyclopedia/elbow_and_forearm/Cubital_Tunne
Return Records
Cubital Tunnel Syndrome
Causes
Symptoms Treatment What is Cubital Tunnel Syndrome? (Entrapment of the Ulnar Nerve)
The ulnar nerve, along with the radial and median nerves, is one of the three major nerves of the arm.  It supplies sensation to most of the hand muscles, as well as to much of the forearm.  If there is pressure on the ulnar nerve as it passes through the cubital tunnel, a bony passageway along the inside of the elbow, there will be sensory and motor changes in the hand. Entrapment of the ulnar nerve is also known as cubital tunnel syndrome .  If you “hit your funny bone” and have a tingling sensation in the small and ring fingers, you have hit the ulnar nerve as it is pulled into the bony groove of the cubital tunnel.  With cubital tunnel syndrome there is pressure on the ulnar nerve each time the elbow is bent, reducing the supply of blood to the nerve.  This causes damage to the nerve over time. There are three long bones in the arm: the humerus, or upper arm, and the ulna and radius, the two bones of the lower arm. The bone on the little finger side of the forearm is the ulna, and the bone on the thumb side of the forearm is the radius.  The elbow joint is a hinge joint formed by the end of the humerus and the end of the ulna, the larger bone. The ulna is smaller at the wrist, and widens quite a bit towards the elbow.  Multiple ligaments attach these bones together at the elbow, allowing the joint to bend like a hinge.

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