5 Written questions
5 Matching questions
- Brachial Plexus: ULNAR NERVE
- Spinal Nerve Branches: RAMUS
- The Major Plexses: COCCYGEAL PLEXUS
- Protective Nerve Coverings: PERINEURIUM
- Brachial Plexus: RADIAL NERVE
- a - this nerves supplies the anteromedial muscles of the forearm and most of the muscles of the hand.
- b - the roots of spinal nerves (anterior rami) S4-S5 for this small plexus.
- supplies a small area of skin in the coccygeal region.
- c -this is a thicker sheath of connective tissue that packages groups of nerve fibers together into bundles called fasciculi.
- consists of collagenous sheaths w/ up to 15 layers of fibroblasts distributed in a meshwork of collagen.
- this sheath functions as a diffusion barrier that maintains the osmotic environment and fluid pressure w/in the endoneurium.
- d - the spinal nerve trunk runs for a short distance before branching into two large branches and a variable series of smaller branches, each large branch is called a??
-this branch follows a specific course to different peripheral regions.
-the 2 larges branches are:
1.) Anterior (ventral) Ramus
2.) Posterior (dorsal) Ramus
- e - this nerve supplies the muscles on the posterior aspect of the arm and forearm.
5 Multiple choice questions
- - two grooves penetrate the white matter of spinal cord and divide it into right and left sides.
- this is a wide groove on the anterior(ventral) side.
- - the anterior rami of spinal nerves T2-T12 do not enter into the formation of plexuses.
- these nerves connect directly to the structures they supply in the intercostal spaces.
- - the roots (anterior rami) of spinal nerves L1-L4 form this plexus.
- there is minimal intricate intermingling of fibers in this plexus.
-this plexus supplies the anterolateral abdominal wall, external genitals, and part of the lower limbs.
- the Femoral & Obturator nerve arise from this plexus.
*more info on pg 600-601
- - integration takes place in the spinal cord gray matter for this reflex.
- example of this type of reflex is the patellar reflex(knee jerk).
- - these are components of the autonomic nervous system(ANS)
5 True/False questions
Meninges: PIA MATER → - this is the most superficial of the 3 spinal meninges, and is composed of dense irregular connective tissue.
- forms a sac from the level of the foramen magnum to the 2nd sacral vertebral.
*Epidural Space - is a space b/w the dura mater and wall of the vertebral canal, filled w/ a cushion of fat and connective tissue that protects the spinal cord.
External Anatomy of Spinal Cord: CAUDA EQUINA → - these are the roots of spinal nerves emerging from the lower part of the spinal cord.
- may resemble fine hairs such as "horse's tail"
Branches of Spinal Nerves: ANTERIOR (ventral) ROOT → - motor neuron axons which transmit nerve impulses from the spinal cord to the periphery.
- the cell bodies of the motor neurons are located in the gray matter of spinal cord.
-cell bodies of motor neurons supplying skeletal muscles are located in anterior gray horns.
-cell bodies of motor neurons supplying smooth muscle, cardiac muscle, or glands are located in the lateral gray horns.
Spinal Nerve Branches: POSTERIOR (dorsal) RAMUS → - this is a somatic branch that runs in the musculoskeletal wall of the body
- this branch serves the deep muscles and skin of the posterior surface of the trunk.
Dermatomes → - each spinal nerve contains sensory neurons that serve specific region of the body; the area of the skin that provides sensory input to the CNS via one pair of spinal nerves, the Trigeminal (V) Nerve is a....
- the entire body is supplied by somatic sensory neurons that carry nerve impulses into spinal cord and brain stem.
- underlying skeletal muscles receive signals from somatic motor neurons that carry impulses out of spinal cord.