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5 Written questions

5 Matching questions

  1. Brachial Plexus: ULNAR NERVE
  2. Spinal Nerve Branches: RAMUS
  3. The Major Plexses: COCCYGEAL PLEXUS
  4. Protective Nerve Coverings: PERINEURIUM
  5. Brachial Plexus: RADIAL NERVE
  1. a - this nerves supplies the anteromedial muscles of the forearm and most of the muscles of the hand.
  2. b - the roots of spinal nerves (anterior rami) S4-S5 for this small plexus.
    - supplies a small area of skin in the coccygeal region.
  3. 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.
  4. 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
  5. e - this nerve supplies the muscles on the posterior aspect of the arm and forearm.

5 Multiple choice questions

  1. - 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.
  2. - 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.
  3. - 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
  4. - integration takes place in the spinal cord gray matter for this reflex.
    - example of this type of reflex is the patellar reflex(knee jerk).
  5. - these are components of the autonomic nervous system(ANS)

5 True/False questions

  1. 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.


  2. 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"


  3. 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.


  4. 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.


  5. 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.