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5 Written questions

5 Matching questions

  1. Spinal Nerves
  2. The Major Plexuses: BRACHIAL PLEXUS
  3. Sensory&Motor Tracts: INDIRECT PATHWAYS
  4. Sensory&Motor Tracts: SPINOCEREBELLAR TRACTS
  5. Branches of Spinal Nerves: ANTERIOR (ventral) ROOT
  1. a - 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.
  2. b - the roots of spinal nerves C5-C8 and T1 form this plexus.
    - this plexus provides almost the entire nerve supply of the shoulders and upper limbs.
    - Five important nerves arise from this plexus:
    1.) Axillary Nerve
    2.) Musculocutaneous Nerve
    3.) Radial Nerve
    4.) Median Nerve
    5.) Ulnar Nerve

    *study more info on Pg 597-599
  3. c - these nerves are part of the peripheral nervous system(PNS).
    -they connect the CNS to sensory receptors, muscles, and glands in all parts of the body.
    -there are 31 pairs of these nerves.
    - 8 pairs of cervical nerves
    - 12 pairs of thoracic nerves
    - 5 pairs of lumbar nerves
    - 5 pairs of sacral nerves
    - 1 pair of coccygeal nerves
  4. d - 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.
  5. e - these tracts are involved with:
    1.) Subconscious Proprioception
    2.)Posture, balance, and coordination of skilled movements

5 Multiple choice questions

  1. - this is the outer connective tissue sheath, that bundles all the fasciculi together to form a single nerve.
    - consists of fibroblasts and thick collagen strands that mainly parallel the axis of the nerve.
    - this sheath gives the nerve the necessary tensile strength to resist the tensile forces than can damage the nervous tissue.
  2. - this nerve supplies the muscles on the posterior aspect of the arm and forearm.
  3. - the axon and its associated glial cells form this.
    - is a process projecting from the cell body of a neuron.
  4. - motor output to skeletal muscles travels down the spinal cord in two types of descending pathways:
    1.) Direct
    2.) Indirect
  5. - these are clusters of neuronal cell bodies, as functional groups.
    *Sensory Nuclei - receive input from receptors via sensory neurons.
    *Motor Nuclei - provide output to effector tissues via motor neurons

5 True/False questions

  1. Sensory&Motor Tracts: POSTERIOR COLUMNS- include the Gracile Fasciculus and Cuneate Fasciculus, which carry nerve impulses for several kinds of of sensations that includes:
    1.) Proprioception - awareness of positions/movements of muscles, tendons, and joints
    2.) Discriminative Touch
    3.) Two-Point Discrimination - ability to distinguish touching of two diff points on the skin
    4.) Light Pressure Sensations -
    5.) Vibration Sensations

          

  2. The Major Plexses: COCCYGEAL PLEXUS- the roots of spinal nerves C5-C8 and T1 form this plexus.
    - this plexus provides almost the entire nerve supply of the shoulders and upper limbs.
    - Five important nerves arise from this plexus:
    1.) Axillary Nerve
    2.) Musculocutaneous Nerve
    3.) Radial Nerve
    4.) Median Nerve
    5.) Ulnar Nerve

    *study more info on Pg 597-599

          

  3. 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.

          

  4. Reflexes & Reflex Arcs: REFLEX- 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. Protective Nerve Coverings: PERINEURIUM-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.

          

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