Spinal cord Flashcards
1
Q
How many segments does the spinal cord have?
A
31
2
Q
What is the spinal cord
A
column of nervous tissue that extends from the brain into the vertebral canal
3
Q
What do the 31 segments give rise to?
A
a pair of spinal nerves
4
Q
What does the spinal cord have?
A
A cervical enlargement and a lumbar enlargement
5
Q
What does a central core of grey matter lie in
A
Within white matter
6
Q
What does white matter consist of?
A
Bundles of myelinated axons called tracts
7
Q
What does the spinal cord provide?
A
A two way communication system between the brain and other parts as a centre for spinal reflexes
8
Q
What do ascending tracts conduct?
A
Sensory impulses from sensory receptors to the brain
9
Q
What do descending tracts conduct?
A
Motor impulses from the brain to muscle and glands
