Chpt 13 Flashcards
Below L 2, the vertebral canal is occupied by a bundle of spinal nerves called
the caudal equina
The brachial plexus give rise to all of the following nerves except
The obturator nerve
Nerve fibers that adjust the tension in a muscle spindle are called
gamma motor neurons
A stretch reflex requires the action of _______ to prevent an antagonistic muscle from interfering with the agonist.
reciprocal inhibitions
A patient has a gunshot wound that caused a bone fragment to nick the spinal cord. The patient now feels no pain or temperature sensations from that level of the body down. Most likely the _____ was damaged.
spino-thalamic tract
Which is not a region of the spinal cord
pelvic
In the spinal cord, the somas of the lower motor neurons are found in the
the anterior horns
The outermost connective tissue wrapping of the spinal nerve is called the
epineurium
The intercostal nerves between the ribs arise from which spinal nerve plexus?
thorasic
All somatic reflexes share all of the following properties execept
They are monosynaptic
Outside the CNS the somas of the neurons are clustered in swellings called
Ganglia
Distal to the inter vertebral foramen, a spinal nerve branches into an anterior and posterior
Ramus
The cerebellum receives feedback from the muscles and joints by way of the _____ tracts of the spinal cord.
spinocerebellar
In the _____ reflex, contraction of the flexor muscles in one limb is accompanied by the contraction of extensor muscles in the contralateral limb
Cross extension
Modified muscle fibers serving primarily to detect stretch are called
Intrafusal fibers
