human anatomy nerves

  1. spinal cord
    responsible for reflexes which are the quickest reactions to a stimuli. 31 pairs of spinal nerves
  2. nerve plexus in the spinal cord
    • the anterior rami of most spinal nerves form nerve plexus on both sides of the body
    • the plexus are the cervical plexus, brachial plexus, lumbar plexus, sacral plexus.
  3. dermatomes
    is the area of skin innervated by the cutaneous branches of a single nerve.
  4. pathways
    the CNS communicates with the peripheral body structures though these, it consists of a tract and a nucleus.
  5. sensory pathways
    primary, secondary, and sometimes tertiary neurons.
  6. motor pathways
    upper motor and lower motor neurons.
  7. motor pathway
    • direct pathway- conscious control of skeletal muscle activity.
    • indirect pathway- unconscious control of skeletal muscle activity.
  8. reflexes
    • are rapid automatic involuntary reactions of muscles or glands to a stimulus.
    • monosynaptic- sensory axons synapse directly on motor neurons whose axons project to the effector.
    • polysynaptic- more complex pathway that exhibit a number of synapses involving interneurons within the reflex arch.
  9. Autonomic nervous system
    • 2 divisions (of things we cant control)-
    • sympathetic nervous system- fight or flight short pregangion, long post ganglion.
    • parasympathetic nervous system- rest and digest. long preganglion short post ganglion.
  10. general sense receptors
    temprature, pain, touch, stretch, and pressure
  11. special senses
    gustation, olfactory, vision, equilibrium, and audition.
  12. receptors
    structures that detect stimuli, can be structurally complex like the eye or very simple (dendrite endings in the nose)
  13. receptive field
    the smaller the receptive field the more sensitive and precise the receptor.
  14. exteroceptors
    found in skin or mucous membrane such as nasal or oral cavities.
  15. interoceptors
    found in the walls of visceral
  16. proprioreceptors
    found in muscles, tendons and joints
  17. somatic receptors
    they include receptors for chemicals, temperature, pain, touch, propriorection, and pressure.
  18. visceral receptors
    they respond to chemicals, temperatures and pressure.
  19. nociceptors
    detects tissue damage and pain.
Card Set
human anatomy nerves
nerves for shorelines movakels