spina /spi·na/ (spi´nah) pl. spi´nae [L.] spine.
spina
spina [spi´nah] (L.)
spina bi´fida a developmental anomaly marked by defective closure of the vertebral arch, through which the meninges may (s. bi´fida cys´tica) or may not (s. bi´fida occul´ta) protrude. 
)
Two types of spina bifida cystica shown in transverse section through the spinal column. (A), Meningocele, characterized by protrusion of the meninges; (B), a form of myelocele characterized by myeloschisis and protrusion of the defective spinal cord.
)
Spina bifida occulta shown in a transverse section through the spinal column.
spina vento´sa dactylitis, usually in infants and young children, with enlargement of digits, caseation, sequestration, and sinus formation.
spi·na (sp  n )n. pl. spi·nae (-n  ) A spine-shaped or sharp thornlike anatomical process. |
spina
1 the spinal column.
2 a spine or a thornlike projection, such as the bony projection on the anterior border of the ilium, forming the anterior end of the iliac crest.
spina [spi´nah] (L.)
spine (def. 1).
spina bi´fida a developmental anomaly characterized by defective closure of the bony encasement of the spinal cord; the spinal cord and meninges may or may not protrude through the defect (see spina bifida cystica and spina bifida occulta). It is further classified according to the extent of neural involvement (see meningocele and meningomyelocele). See also neural tube defect.
spina bi´fida ante´rior a defect of closure on the anterior surface of the bony spinal canal, often associated with defective development of the abdominal or thoracic viscera.
spina bi´fida cys´tica spina bifida in which there is protrusion through the defect of a cystic swelling that contains the meninges (meningocele) or the meninges and spinal cord (meningomyelocele).
spina bi´fida occul´ta spina bifida in which there is a defect in the bony spinal canal without protrusion of the cord or meninges.
Spina bifida occulta. Posterior vertebral arches have not fused; there is no herniation of the spinal cord or meninges. From Frazier et al., 2000.
spina vento´sa dactylitis of the bones of the hands or feet, occurring mostly in infants and children, with enlargement of digits, caseation, sequestration, and sinus formation.
spina
pl. spinae [L.] spine; a slender process such as occurs on many bones.
spina bifida
a developmental anomaly characterized by defective closure of the two halves of the vertebral arch through which the spinal cord and meninges may or may not protrude.
spina bifida cystica
spina bifida in which there is protrusion through the defect of a cystic swelling involving the meninges (meningocele), spinal cord (myelocele) or both (meningomyelocele).
spina bifida occulta
spina bifida in which there is a defect of the bony spinal canal without protrusion of the cord or meninges.
spina bifida ventralis
a defect of closure on the ventral surface of the bony spinal canal, often associated with defective development of the abdominal and thoracic viscera.
spine, spina
1. a thornlike process or projection.
2. the backbone, or vertebral column. See also spinal.
cuneal spine
the axial ridge of the upper surface of the frog in the hoof of the horse that projects into the digital cushion.
iliac spine
small salients along the dorsal and ventral borders of the ilium, divided into cranial and caudal, dorsal and ventral, in cats and dogs, contrasted to the single sacral and coxal tubers in large animals.
ischial spine
the crest of bone to which the sacrosciatic ligament attaches and which provides the origin of the gluteus profundus muscle.
plant s's
cause cutaneous laceration and subcutaneous abscess, oral mucosal laceration and ulceration, conjunctival injury.
scapular spine
the ridge that divides the lateral surface of the scapula into the supraspinous and infraspinous fossae.
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