2019-01-22 12:29:09

Today's topics

  • Quiz 1
  • Wrap up on neuroanatomy

Quiz 1

Wrap up neuroanatomy

Brodmann Areas

Brodmann Areas

Brodmann Areas

Spinal cord

  • Rostral/Caudal axis
    • Spinal column w/ vertebrae
    • Cervical (8), thoracic (12), lumbar (5), sacral (5), coccygeal (1)
    • Spinal segments & 31 nerve pairs
    • Cauda equina, horse-tail like extension of axon fibers

Spinal cord

Spinal cord

  • Organization of the spinal cord
    • Dorsal/Ventral
      • Dorsal root (sensory)
      • Ventral root (mostly motor)
    • Grey (interior) vs. white matter (exterior)

Organization of the PNS

  • Somatic division

  • Autonomic division

  • Cranial nerves

  • Spinal nerves

Cranial nerves

  • Afferents (input), efferents (output), or mixed
  • Innervate head and neck
  • Olfactory (I), optic (II), (VIII) auditory, vagus (X), etc.
  • Spinal nerves

Cranial nerves

Autonomic Nervous System (ANS)

  • CNS & PNS components
  • Controls "vegetative functions""
    • Limited voluntary control
  • Two divisions
    • Sympathetic
    • Parasympathetic ('around' the sympathetic)

ANS

Sympathetic division

  • Prepares body for action
  • "Fight or flight""
  • Spinal cord
    • ganglion chain along spinal column to End organs
  • NTs
    • Preganglionic: ACh
    • Post: NE

Parasympathetic division

  • Para -> "around"
  • Restorative function
  • "Rest & digest"
  • Spinal cord -> ganglia near end organs -> end organ
    • NT: ACh

Cajal/Swanson Architecture

Next time…

  • Cells of the nervous system

References