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Spina Bifida Glossary Other Resources Links Clinics Local SBAA Chapters Books ... Z anencephaly an·en·ceph·a·ly [an- neg. + Gr. Enkephalos brain] [MeSH: Anencephaly] congenital absence of the calvaria, with cerebral hemisphere missing or reduced to small masses attached to the base of the skull; complete absence of the brain is rare. Cf. meroanencephaly
Arnold-Chiari malformation Ar·nold-Chi·ari malformation (deformity, syndrome) [Julius Arnold, German pathologist, 1835-1915; Hans Chiari, Austrian pathologist, 1851-1916] see Malformation
Back to Top bladder blad·der [L. vesica, cystis; Gr. Kystis] [MeSH: Bladder] 1. A membranous sac, such as one serving as receptacle for a secretion; see also vesica and cyst. 2. Urinary b.; see vesica urinaria.
- Areflexic b.,
- autonomous b.
- Atonic b., a condition marked by a dilated, poorly contracting urinary bladder without evidence of a lesion of the central nervous system.
- Atonic neurogenic b., neurogenic bladder due to destruction of the sensory nerve fibers from the bladder to the spinal cord, marked by the absence of control of bladder functions and of the desire to void, overdistention of the bladder, and an abnormal amount of residual uring; it is most frequently associated with tabes dorsalis (tabetic b.) and pernicious anemia, but may be seen in association with other diseases. Called also paralytic b. and sensory paralytic b.
- Automatic b., neurogenic bladder due to complete transection of the spinal cord above the sacral segments, marked by complete loss of micturition reflexes and bladder sensation, violent involuntary voiding, and an abnormal amount of residual urine. Called also cord b., reflex b., and spastic b.
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