Spinal Cord

Question 1

spinal cord can be divided into what 5 segments? How many nerves in each?

Answer 1

Cervical - 8 nerves 
thoracic -12 nerves 
lumbar - 5 nerves 
sacral - 5 serves 
Coccyx - 1 nerve

Question 2

what are the 2 spinal enlargements?

Answer 2

Cervical Enlargement -C4-T1

Lumbosacral Enlargement -L2-S3

Question 3

where does the spinal cord end?

Answer 3

L1-L2

Question 4

what controls the external urethral sphincter?

Answer 4

somatic motor efferents

Question 5

what controls the internal urethral sphincter?

Answer 5

sympathetic efferents

Question 6

what is the posterior column split into? is this the start of an ipslateral tract or contralateral?

Answer 6

fasciculus gracilis/ facicilus cutaneatus

ipslateral

Question 7

Which posterior column deals with lower limb?

Answer 7

lower limb (sacral and lumbar)

Question 8

which posterior column deals with the upper limb?

Answer 8

upper limb (cervical & thoracic )

Question 9

which tract deals with the voluntary movement of the extremities?

Answer 9

lateral corticospinal tract

Question 10

which tract deals with the core and respond to changes to create core stability?

Answer 10

anterior corticospinal tract

Question 11

why does the anterior corticospinal tract innervate both the ipslateral and contralateral lower motor neurons?

Answer 11

so that if there was an injury to one side you would still be able to control your abdominals/posture