supplies the muscles of the posterior aspect of the arm and forearm
Ulna nerve
supplies the anteromedial muscles of the forearm and most of the muscles of the palm
femoral nerve
largest nerve arising from the lumbar plexus
sciatic nerve
the largest nerve of this plexus and also the largest nerve in the body
subdural space
between the dura matter and the arachnoid
epidural space
between the vertebral walls and the dura matter. Which is filled with fat, connective tissue, and blood vessels
dura matter
(tough mother) the outer layer
subarachnoid space
between the arachnoid and the pia matter
cervical enlargement
gives rise to nerves that supply the upper extremities
lumbosacral enlargement
gives rise to the nerves that supply the lower extremities
arachnoid
(spider-like) the middle meninx
meninges
the spinal cord is covered by 3 layers of connective tissue called
fissure
deep groove running along its entire length
sulcus
shallow groove running along its length
afferent (sensory neurons)
neurons that transmit information from receptor in the body to the central nervous system
efferent (motor neurons)
nerve cells that transmit information from the central nervous system to the muscles and glands
association neurons
other neurons located entirely in the brain and spinal cord, transmit impulses from sensory neurons to motor neurons
unipolar neurons
neurons with only a single cellular process. These neurons are ALWAYS affarent neurons; their single process is an axon, and their dendrite-like endsconnect directly to the axon.
multipolar neurons
neurons with more that two cellular processes (many dendrites, but only one axon) These are either efferent or association neurons.