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Flashcards

Somatic Nervous System

Kristina Redd Gross Anatomy English 50 cards

Somatic Nervous System

Cards in this deck (50)

  1. 1These motor (efferent) neurons convey neural impulses from the CNS (brain & spinal cord) to distant targets, such as muscles, organs, and glands.Multipolar neurons
  2. 2These sensory (afferent) neurons convey neural impulses from sensory receptor (in skin, muscles, organs) to the CNS.Pseudounipolar neurons
  3. 3The nervous system can be divided into two parts based on ___ and ___ .structure and function
  4. 4What are the structural subdivisions of the NS?Central NS and Peripheral NS
  5. 5What are the functional subdivisions of NS?Somatic (voluntary) NS
    &
    Autonomic (involuntary) NS
  6. 6What is the involuntary division of the NS?Autonomic
  7. 7What is the voluntary division of the NS?Somatic
  8. 8What are two functions of the CNS?1. integrates/coordinates incoming and outgoing signals
    2. carries out higher order "cognitive" functions such as learning & memory
  9. 9What are the two body parts of the CNS?brain and spinal cord
  10. 10What do cross-sections of the spinal cord reveal?gray matter and white matter
  11. 11This particular type of matter is somewhat H-shaped. It consists of regions within the CNS with a high density of neuronal cell bodies.Gray matter
  12. 12This particular type of matter consists of nerve axon bundles (tracts), which travel to and from the brain.White matter
  13. 13How are gray matter regions divided?Dorsal and Ventral horns
  14. 14What type of horns lie on the posterior side of gray matter?Dorsal horns
  15. 15What type of horns lie on the anterior side of gray matter?ventral horns
  16. 16This system consists of all neural tissues outside the CNS.Peripheral Nervous System
  17. 17This division of the NS conducts impulses to or away from the CNS.Peripheral Nervous System
  18. 18What is a ganglion (ganglia)?A collection of nerve cell bodies in the PNS
  19. 19What is a bundle of nerve axons in the PNS?peripheral nerve
  20. 20How are peripheral nerves classified?As either cranial nerves or spinal nerves
  21. 21How many pairs of cranial nerves are there?12 pair
  22. 22What arises from the spinal cord?spinal nerves (peripheral nerves)
  23. 23How many pairs of spinal nerves are there? What are the different types?31 pairs
    - 8 cervical
    - 12 thoracic
    - 5 lumbar
    - 5 sacral
    - 1 coccygeal
  24. 24How many spinal segments are throughout the length of the spinal cord?31 (one for each pair of spinal nerves)
  25. 25How do spinal nerves arise from the spinal cord?By rootlets
  26. 26What do rootlets converge to form?Dorsal roots and Ventral roots
  27. 27Dorsal and Ventral roots unit to form a ____ ____ .spinal nerve
  28. 28Identify the formation of a spinal nerve.Identify the formation of a spinal nerve.Identify the formation of a spinal nerve.
  29. 29Spinal nerves divide into two branches of these.Dorsal and Ventral rami
  30. 30What type of nerves are spinal nerves and their branches (dorsal & ventral rami) considered?peripheral nerves
  31. 31Dorsal rami convey nerve fibers (axons) to/from what?Back muscles and skin overlying the back
  32. 32Ventral rami convey nerve fibers (axons) to/from what?Anterior and lateral regions of the torso/trunk
    arms and legs
  33. 33What are the types of peripheral nerves?somatic motor, somatic sensory, visceral motor, and visceral sensor
  34. 34____ ____ ____ convey impulses from the CNS to skeletal (voluntary) muscles.Somatic motor nerves
  35. 35Are somatic motor nerves multipolar or pseudounipolar?multipolar
  36. 36___ ____ ____ convey sensations from the body to the CNS.Somatic Sensory Nerves
  37. 37What 3 types of sensations are experienced by somatic sensory nerves?pain, touch, and temperature
  38. 38Are somatic sensory nerves multipolar or pseudounipolar?pseudounipolar neurons
  39. 39Where do cell bodies of somatic motor nerves reside in?ventral horn
  40. 40The axons of the somatic motor nerves exit the spinal cord via the ___ ___ and ultimately innervate skeletal muscles.ventral root
  41. 41Somatic sensory nerve axons project into the dorsal horn of the spinal cord via what root?the dorsal root
  42. 42Where do the cell bodies of the somatic sensory nerves reside?Dorsal root ganglion
    (a swelling located along the dorsal root of all spinal nerves)
  43. 43These ___ ____ nerves convey impulses from the CNS out to skeletal (voluntary) muscles, such as biceps.Somatic Motor
  44. 44These ___ ___ nerves convey sensations (pain, temp, touch, proprioception) from the body to the CNS.Somatic (General) Sensory
  45. 45What two types of neurons does the SNS or "voluntary" nervous system utilize?sensory portion
    &
    motor portion
  46. 46What does the sensory portion of the SNS convey?sensations of touch, temp, pain from peripheral sensory receptors
  47. 47What does the motor portion of the SNS convey?voluntary or reflexive movements by contracting skeletal muscles
  48. 48If I touched a warm iron, what nervous system is being used?SNS
  49. 49What does the Autonomic Nervous System innervate?organs (viscera) in the body cavities
    smooth & cardiac muscle
    glands (sweat & salivary)
  50. 50What parts of the body doesn't the somatic nervous system innervate?organs (viscera) in the body cavities
    smooth & cardiac muscle
    glands (sweat & salivary)

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Gross Anatomy Flashcards on Somatic Nervous System, created by Kristina Redd on 12/07/2017.
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Kristina Redd
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