Lesson 19 Lab

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msu-malexander
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113196
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Lesson 19 Lab
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2011-10-30 17:08:39
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Anatomy Brain Cranial Nerves
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Anatomy of the Brain and Cranial Nerves
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  1. What consists of the CNS, and what is its primary job?
    brain and spinal cord, interpret incoming information and issue instructions
  2. What consist of the PNS, and what do they do?
    cranial and spinal nerves, ganglia, and sensory receptors; serve as communication lines as they carry impulses
  3. How does the brain form?
    in fetal development, two anterior outpocketings extend from the forebrain and grow fast to form the cerebral hemispheres.
  4. What is the most superior portion of the brain?
    cerebral hemispheres
  5. Gyri
    elevated ridges of tissues
  6. sulci
    seperate gyri by shallow grooves
  7. central sulcus
    divides the frontal lobe from the partietal lobe
  8. lateral sulcus
    seperates the temporal lobe from the partietal lobe
  9. parieto-occipital sulcus
    on the medial surface of each hemisphere divides the occipital lobe
  10. postcentral gyrus
    impulses traveling from the bodys sensory receptors are located here
  11. Precentral gyrus
    where the primary motor area is located
  12. cerebral cortex
    gray matter of the cerebrum
  13. cerebral white matter
    composed of fiber tracts carrying impulses to of from the cortex
  14. olfactory Bulbs and tracts
    synapse point of cranial nerve I
  15. Optic Nerves
    cranial nerve II
  16. optic chiasma
    where the fibers of the optic nerves partially cross over
  17. midbrain
    connecting the pons below with cerebrum above
  18. pons
    "bridge" consists primarily of motor and sensory fiber tracts connecting the brain with lower CNS centers
  19. Medulla oblongata
    lowest brain stem region, composed primarily of fiber tracts
  20. decussation of pyramids
    crossover point for the major motor tracts
  21. corpora quadrigemina
    located on the posterior aspect of the midbrain, a brain stem structure
  22. corpus callosum
    major commissure connecting the cerebral hemispheres, it arches above the structures of the diencephalon and roofs over the lateral ventricles.
  23. fornix
    a bandlike fiber tract concerned with olfaction as well as limbic system functions
  24. septum pellucidum
    seperates the lateral ventricles of the central hemisphere
  25. caudate nucleus
    most important basal ganglia, it is arching and comma shaped
  26. lentiform nucleus
    composed of the putamen and globus pallidus nuclei
  27. corona radiata
    a spray of projection fibers coursing down from the precentral gyrus
  28. internal capsule
    a broad band of fibrous material
  29. corpus stratum
    sometimes what the caudate nucleus and lentiform nucleus are referred to
  30. thalamus
    consists of two large lobes of gray matter that laterally enclose third ventricle of the brain
  31. intermediate mass
    connects two thalamic lobes and bridges the ventricle
  32. interventricular foramen
    tiny orifice connecting the third ventricle with the lateral ventricle on the same side
  33. hypothalamus
    makes up the floor and the inferolateral walls of the third ventricle
  34. infundibulum
    what the pituritary gland hangs from, a slender stalk
  35. pineal gland
    in the epithalamus, a neuroendocrine structure
  36. cerebral aqueduct
    a slender canal traveling through the midbrain, connecting the third and fourth ventricle in the hindbrain
  37. cerebellum
    made of two lateral hemispheres each with three lobes
  38. arbor vitae
    tree like braching of the cerebellar white matter
  39. meninges
    connective tissue membranes
  40. dura mater
    the outer most meninx and is leathery. it is double layered
  41. periosteal layer
    inner layer of dura mater
  42. meningeal layer
    outermost brain covering of the dura mater and continous with spinal cord
  43. arachnoid mater
    the middle meninx, weblike,
  44. pia mater
    highly vascular and delicate, clings tenaciously to the surface of the brain following its convolutions
  45. choroid plexus
    small capillary knots hanging from the roof of the ventricles of the brain
  46. What does cerebrospinal fliud do?
    forms a watery cushon that protects the delicate brain against blows to the head.
  47. interventricular foramina
    what the CSF surculates through
  48. Olfactory
    • Number: I
    • Function: smell
  49. Optic
    • Number: II
    • Function: vision
  50. Vestibulocochlear
    • Number: VIII
    • Location: 2 branches; vestibular = assoc. with equilibrium cochlear = assoc. with hearing

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