Spinal Cord Anatomy
The innermost of the meninges
Pia Mater
How many spinal nerves are there?
31 pairs (62 spinal nerves in all)
The name of the bundles of nerve fibers that transmit motor output from the brain
Descending tract
The name of the largest nerve arising from the sacral plexus - Nerve roots L4-S3
Sciatic nerve
Integration of reflexes takes place where in the spinal cord?
In the grey matter
Act as "highways" for nerve impulses travelling to and from the brain
White columns
The outermost connective tissue wrapping around a spinal nerve
Epineurium
The spinothalamic tract is what kind of tract?
Ascending tract
Why does complete severing of the spinal cord at the level of C2 result in respiratory arrest?
The phrenic nerve is made up of nerve roots C3, C4 and C5. The phrenic nerve innervates the diaphragm
The stretch reflex is what kind of reflex?
Monosynaptic Ipsilateral reflex
The level at which the spinal cord ends in an adult
The superior aspect of L2
The efferent nerve is what kind of nerve?
Motor nerve
The site of integration of EPSPs and IPSPs
Grey matter
What is the name for compression of the brachial plexus?
Thoracic outlet syndrome
What are the sensory receptors in the tendon reflex
Golgi Tendon Organs
The central bar of the "H" of the grey matter
Grey commissure
Which nerve root contains the sensory nerves
Posterior or dorsal root
The origin and destination of the anterior spinocerebellar tract
The spine and the cerebellum.
What are the five terminal branches of the brachial plexus?
Musculocutaneous, Axillary, Radial, Ulnar and Median Nerves
What is a contralateral reflex arc
One where the motor nerve leaves the spinal cord on the opposite side to the sensory nerve
The ligament connecting the spinal cord to the coccyx
Filum Terminale
What are the branches of a spinal nerve called
Rami/Ramus
The two tracts in the posterior column of the spinal cord are what kind of tract
Ascending tracts
What are the divisions of the brachial plexus
Roots, Trunks, Divisions, Cords, Branches
What is reciprocal innervation?
The antagonist muscle is inhibited and relaxes as the agonist contracts