wrappings
The endoneurium is made of ______.
areolar connective tissue
Which connective tissue layer directly surrounds a nerve fascicle?
perineurium
After leaving the intervertebral foramen, a typical spinal nerve almost immediately splits into branches, termed ______.
rami
Which spinal nerve rami do not form plexuses?
posterior rami
Branches of the cervical plexuses innervate anterior ______ as well as the skin of the neck and portions of the ______ .
neck muscles, head & shoulders
The epineurium is made of ______ connective tissue.
dense irregular
Cranial nerves are numbered according to their positions, beginning with the nerve that is ______.
most anterior
The eighth spinal nerve exits the intervertebral foramen between the ______ vertebrae.
C7 and T1
Each set of rami communicantes extends between the spinal nerve and a ball-like structure called the sympathetic ______.
trunk ganglion
The radial nerve arises from the ______ cord of the brachial plexus.
posterior
An individual axon is wrapped in a connective tissue covering called the ______.
endoneurium
A spinal nerve contains ______ axons.
motor & sensory
The anterior and posterior roots of the lumbar and sacral spinal nerves are _______ than the roots of the other spinal nerves.
longer
The phrenic nerve travels through the thoracic cavity to innervate the ______.
diaphragm
One important branch of the cervical plexus is the phrenic nerve, which is formed primarily from the ______ nerve and some contributing axons from ______.
C4, C3 and C5
Sensory and motor nerves are part of the ______ nervous system.
peripheral
The anterior and posterior roots of the thoracic spinal nerves merge to form a spinal nerve within an intervertebral foramen that is ______ to the vertebra of the same number.
inferior
After splitting from the spinal nerve, the anterior ramus divides into multiple other branches, which innervate the ______ portions of the trunk, the upper limbs, and the lower limbs.
anterior & lateral
The left and right brachial plexuses are networks of nerves that supply the ______.
upper limb
Each brachial plexus is formed by the anterior rami of spinal nerves ______.
C5-T1
An entire nerve is surrounded by a connective tissue covering called the ______.
epineurium
In adults, since the spinal cord is shorter than the vertebral canal, the roots of the lumbar and sacral spinal nerves have to travel ______ to reach their respective intervertebral foramina through which they pass before they can merge and form a spinal nerve.
inferiorly
The rami communicantes contain axons associated with the ______ nervous system.
autonomic
he ______ rami of most spinal nerves form nerve plexuses on the right or left side of the body.
anterior
The radial nerve innervates the forearm ______ and the posterior forearm muscles.
extensors