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5 Written questions

5 Matching questions

  1. Brachial Plexus: RADIAL NERVE
  2. Internal Anatomy of Spinal Cord: POSTERIOR MEDIAN SULCUS
  3. Reflexes & Reflex Arcs: CRANIAL REFLEX
  4. Internal Anatomy of Spinal Cord: LATERAL GRAY HORNS
  5. Brachial Plexus: MEDIAN NERVE
  1. a - these horns are b/w the anterior and posterior gray horns.
    - are present only in the thoracic, upper lumbar, and sacral segments of the spinal cord.
    - contain the cell bodies of autonomic motor nuclei that regulate activity of smooth muscle, cardiac muscle, and glands.
  2. b - integration takes place in the brain stem for this type of reflex.
    - example is the tracking movements of eyes as you read this sentence.
  3. c - this nerve supplies the muscles on the posterior aspect of the arm and forearm.
  4. d - this nerve supplies most of the muscles of the anterior forearm.
  5. e - two grooves penetrate the white matter of the spinal cord and divide it into right and left sides.
    - this is a narrow groove on the posterior (dorsal) side.

5 Multiple choice questions

  1. - each spinal nerve is attached to a spinal segment by two roots:
    - are sensory nerve fibers that transmit nerve impulses from the periphery into the spinal cord.
    *Posterior Dorsal Root Ganglion - contains the cell bodies of the sensory neurons.
  2. - from an exterior view of the spinal cord, two enlargements can be seen:
    1.) Cervical Enlargement - is the superior enlargement that extends from C4-T1. Nerves to and from the upper limbs arise from this enlargement.
    2.) Lumbar Enlargement - is the inferior enlargement, extends from T9-T12. Nerves to and from the lower limbs arise from here.
  3. - 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.
  4. - axons from the anterior rami of spinal nerves, except for thoracic nerves(T2-T12) do not go directly to the body structures they supply. instead they form networks of axons on both the left and right side of the body joined w/ various numbers of axons from anterior rami of adjacent nerves.
    -the main plexuses are:
    1.) Cervical Plexus
    2.) Brachial Plexus
    3.) Lumbar Plexus
    4.) Sacral Plexus
  5. - 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.

5 True/False questions

  1. Reflexes & Reflex Arcs: SPINAL REFLEX- integration takes place in the brain stem for this type of reflex.
    - example is the tracking movements of eyes as you read this sentence.

          

  2. The Major Plexuses: CERVICAL PLEXUS- this plexus is formed by the roots of the first four cervical nerves(C1-C4), there is one on each side of neck.
    - supplies the skin and muscles of the head, neck, and superior part of the shoulders and chest.
    -Phrenic nerves arise from this plexus, and supply motor fibers to diaphram.

          

  3. Brachial Plexus: ULNAR NERVE- this nerve supplies the deltoid muscles and teres minor muscles.

          

  4. Sensory&Motor Tracts: DIRECT PATHWAYS- this pathway includes:
    1.) Rubrospinal
    2.) Tectospinal
    3.) Vestibulospinal Tracts
    - they convey nerve impulses that govern automatic movements and help coordinate body movements w/ visual stimuli.
    -also maintain skeletal muscle tone, sustain contraction of postural muscles, and play a major role in equilibrium by regulating muscle tone in response to head movement.

          

  5. Internal Anatomy of Spinal Cord: POSTERIOR(dorsal) GRAY HORNS- contain somatic motor nuclei, which are clusters of cell bodies of somatic motor neurons that provide nerve impulses for contraction of skeletal muscles.

          

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