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5 Written questions

5 Matching questions

  1. The Major Plexuses: LUMBAR PLEXUSES
  2. Internal Anatomy of Spinal Cord: POSTERIOR(dorsal) GRAY HORNS
  3. Internal Anatomy of Spinal Cord: LATERAL GRAY HORNS
  4. Protective Nerve Coverings: ENDONEURIUM
  5. Internal Anatomy of Spinal Cord: POSTERIOR MEDIAN SULCUS
  1. a - contain cell bodies and axons of interneurons as well as axons of incoming sensory neurons.
  2. b - 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.
  3. c - 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.
  4. d - each nerve fiber sits in this loose connective tissue.
    - consists of of a mesh of collagen fibers, fibroblast's, and macrophages surrounded by endoneurial fluid (extracellular fluid) derived from the capillaries.
    - this fluid nourishes the neuron and provides the necessary environment for its function of propagating action potentials.
  5. e - 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

5 Multiple choice questions

  1. - the roots of (anterior rami) of spinal nerves L4-L5 & S1-S4 form this plexus.
    - this plexus supplies the buttocks, perineum, and lower limbs.
    - the largest nerve in the body, the Sciatic Nerve, arises from this plexus, also the Pudendal nerve.
    *more info on Pg 602-603
  2. - 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.
  3. - 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.
  4. - 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. - these tracts are involved with:
    1.) Subconscious Proprioception
    2.)Posture, balance, and coordination of skilled movements

5 True/False questions

  1. White Matter Columns- this matter consists of bundles of myelinated axons of sensory neurons, interneurons, and motor neurons.
    - also organized into regions called columns:'
    1.) Anterior(ventral) white columns
    2.) Posterior (dorsal) White columns
    3.) Lateral White Columns
    -each column contains distinct bundles of axons having a common origin or destination, carrying similar info.

          

  2. Internal Anatomy of Spinal Cord: GRAY MATTER- consists mostly of the cell bodies of neurons, neuroglia, unmyelinated axons, dendrites of interneurons and motor neurons.
    - nuclei that serve as neural processing centers and origins for certain nerves.
    -the gray commissure connects the two sides of the spinal spord.

          

  3. Protective Nerve Coverings: NERVE FIBER- the axon and its associated glial cells form this.
    - is a process projecting from the cell body of a neuron.

          

  4. Spinal Nerve Branches: POSTERIOR (dorsal) RAMUS- this branch reenters the vertebral cavity/canal through the invertebral foramen and supplies the vertebrae, vertebral ligaments, blood vessels of the spinal cordand meninges.

          

  5. Spinal Nerve Branches: RAMUS- these are components of the autonomic nervous system(ANS)