Chapter 7

  1. longitudinal fissure
    single deep fissure that divides cerebral hemispheres
  2. Parkinson's disease
    basal nuclei problem, results from a degeneration of the dopamine-releasing neurons of the substantia nigra, overactive
  3. sympathetic division
    "fight or flight" system. when we are excited or find ourselves in emergency or threatening situations
  4. diencephalon
    that part of the forebrbain between the cerebral hemispheres and the midbrain including the thalamus, the third ventricle, and the hypothalamus
  5. somatic nervous system
    a division of the peripheral nervous system, also called the voluntary nervous system
  6. autonomic nervous system
    the division of the nervous system that functions involuntarily, innervates cardiac muscle, smooth muscle, and glands
  7. meninges
    the membranes that cover the brain and spinal cord
  8. action potential
    an electrical event occurring when a stimulus of sufficient intensity is applied to a neuron or muscle cell, allowing sodium ions to move into the cell and reverse the polarity
  9. irritability
    ability to respond to a stimulus
  10. gyri
    outward folds of the surface of the cerebral cortex
  11. sulcus/sulci
    a furrow on the brain, less deep than a fissure
  12. hypothalamus
    the region of the diencephalon forming the floor of the third ventricle of the brain. important autonomic nervous system center because it plays a role in the regulation of body temp, water balance, and metabolism. part of limbic system
  13. olfactory
    having to do with the sense of smell
  14. peripheral nervous system
    outside of the CNS, consists of the nerves that extend from the brain and spinal cord
  15. central nervous system
    brain and spinal cord, command center of nervous system. interpret sensory information and issue instruction
  16. sensory division
    afferent, convey impulses to the CNS from sensory receptors
  17. motor division
    efferent, carries impulses from the CNS to effector organs. effect (bring about) a motor response
  18. Node of Ranvier
    gaps between Schwann cells
  19. myelin
    whitish fatty material that covers most long nerve fibers. protects and insulates the fibers, increases transmission rate of nerve impulses
  20. interneurons/association neurons
    connect the motor and sensory neurons in neural pathways, always located in the CNS
  21. bipolar neurons
    neurons with an axon and a dendrite
  22. somatic reflex
    all reflexes that stimulate the skeletal muscles
  23. frontal lobe
    has the primary motor area anterior to it that allows us to consciously move our skeletal muscles
  24. broca's area
    base of precentral gyrus, gives ability to speak
  25. reflex
    rapid, predictable, and involuntary responses to stimuli
  26. corpus callosum
     large fiber tract that connects the cerebral hemispheres
  27. choroid plexus
    part of the epithalamus, for the cerebrospinal fluid
  28. contusion
    marked tissue distruction. severe ones result in coma of a few hours to a lifetime. worse than concussion
  29. Alzheimer's disease
    progressive degenerative disease of the brain that ultimately results in dementia
  30. cauda equina
    collection of spinal nerves at the inferior end of the vertebral column
Card Set
Chapter 7
Anatomy Chapter 7 Vocab