LEC.12 Flashcards
Beginning of spinal cord
continuation of medulla , below foramen magnum , at level of C1
length of spinal cord in male and female ?
45 cm in male , 42 in female
brachial plexus originate from ?
cervical enlargment C5-T1
ant.median spinal artery present in ?
ant.median spinal fissure
ant.median spinal artery distribution?
ant.2/3 it means :
1-ant. and lat . horn of spinal cord
2- Motor system( lat. and ventral CST , CBT)
ant.median spinal artery originate from ?
2 ant.spinal branches FROM ant.vertebral artery
post. spinal arteries originate from ?
either PICA or vertebral arteries
post.spinal arteries runs along ?
postro-lateral fissure
post.spinal artery distribution?
post.1/3 :
1- dorsal horn
2-dorsal faniculus
3- sensory system ( gracile, cauniate)
course of radicular artery
they enter from intervertebral foramena
divided into ant. + post
joining ant. and post. spinal arteries
what is the origin of radicular artery ?
they originate according to the place : 1- Neck : from vertebral + ascending cervical . a 2- thorax: intercostal . a 3- abdomen : lumbar . a 4-pelvis : lat.sacral arteries
the site of veins supplying spinal cord ?
Epidural space
what are the horns of gray mater of spinal cord ?
1- ant.horn
2-lat.horn
3-Dors.horn
ant.horn contain?
motor neuron
lat.horn site ?
only in thoracic + u.lumbar(T1-L2 OR L3 )
Lat. horn contain ?
preganglionic sympathatic nerve cells
dorsal contain ?
4 neuclear groups
what are the neulclear group present in dorsal horn ?
1- postero-marginal
2-substantia gelatinosa
3nucleus proprius
3nucleus dorsalis (clarcks nucleus)
site of posteromarginal nucleus ?
at the tip of dorsal horn
function of posteromarginal nucleus ?
mediates pain temp sensation
site of substantia gelatinosa?
at apex of dorsal horn
function of substantia gelatinosa ?
associated with pain , temp sensation
site of nucleus proprius ?
at the center of dorsal horn
function of nucleus of proprius ?
mediate pain , pressure , touch , temp .
site of nucleus dorsalis (clarke’s nucleus) ?
base of dorsal horn , extend from C8-L2 segment
function of nucleus dorsalis
associated with unconscious proprioception
