Biol Lab

  1. Neuroglia or glia cell
    • Support cells in the nervous system
    • Unable to generate AP
  2. Neuroglia in the CNS
    • astrocytes
    • microglia
    • oligodendrocytes
    • ependymal cells
  3. Neuroglia in the PNS
    • Schwann cells
    • satellite cells
  4. Nuclei
    • Clusters of neuron cell bodies in the CNS
    • Make up the gray matter
  5. Ganglia
    collection of neuron cell bodies outside the CNS
  6. Neuron fibers form_____in the CNS but _____ in the PNS
    • 1. tracts
    • 2. peripheral nerves
  7. Neurofibril
    cytoskeleton in Neurons
  8. Nissil bodies
    ER of Neurons
  9. Collaterals
    The branching of an axon
  10. Neurilemma or sheath of Schwann
    • Plasma membrane of Schwann cell
    • Exists only in PNS
  11. Unipolar
    Multipolar neurons
    • sensory
    • olfactory and retinal cells
    • Majority of neurons
  12. Epineurium
    Myelin seath
    differnt layers in order of nerve
  13. Nerve
    a bundle of neuron fibers (axons) wrapped in connective tissue
  14. Mixed nerves
    • Consists of both afferent and efferent fibers
    • Spinal nerves
  15. PNS consists of______
    • cranial nerve
    • spinal nerve
    • ganglia
    • sensory receptors
  16. PNS divides into_____
    • Sensory portioni
    • Motor portion
    • ---somatic nervous system
    • ---autonomic nervous system
    • *****sympathetic branch
    • *****parasympathetic branch
  17. Neural tube --->____
    primary brain vesicles
  18. Primary brain vesicles consists of____
    • Prosencephalon
    • Mesencephalon
    • Rhombencephalon
  19. Secondary brain vesicles:
    • Telencephalon
    • Diencephalon
    • -------------
    • Mesencephalon
    • -------------
    • Metencephalon
    • Myelencephalon
  20. Adult brain structures:
    • Tel - cerebrum
    • Di - diencephalon
    • Mes - midbrain
    • Met - pons & cerebellum
    • Mye - brain stem (medulla)
    • (yellow) - spinal chord
  21. Gyri (s. gyrus)
    elevated ridges on brain
  22. Sulci and fissures
    • shallow and deep grooves in brain
    • used as anatomical landmarks
  23. Longitudinal fissure
    divides brain into L. & R. hemispheres
  24. Central sulcus
    separates F lobe and P lobe
  25. Lateral Sulcus
    separates P lobe and T lobe
  26. Parieto-occipital sulcus
    separates P and O lobe
  27. Lobes are named by____
    cranial bones that cover them
  28. Primary somatosensory cortex
    located in postcentral gyrus of P lobe
  29. Somatosensory association area
    allows you to become aware of pain, touch and temp
  30. Uncus
    Olfactory area located deep in the T lobe
  31. Primary motor area:
    located in the precentral gyrus
  32. Broca's area:
    articulates words
  33. Wernicke's area
    where unfamiliar words are sounded out
  34. Brain stem consists of:
    • peduncles
    • pons
    • medulla oblongata
  35. Copora quadragemina
    • superior colliculi
    • inferior colliculi
  36. Association tracts:
    fiber tracts connect two portions within the same hemisphere
  37. commissures:
    fiber tracts running from one hemisphere to the other
  38. projections:
    fiber tracts that run between cerebral cortex and lower brain structures or spinal chord
  39. Fornix
    bandlike fiber concerned with olfaction and limbic fxs
  40. septum pellucidum
    separate lateral ventricles of the cerebral hemispheres
  41. Nuclei
    • Islands of gray matter located in white matter of the cerebrum (basil ganglia)
    • caudate nucleus
    • letiform nucleus
    • ---putamen and globus pallidus nuclei
  42. corona radiata:
    • projection fibers coursind down precentral gyrus
    • combines with sensory fibers going to sensory cortex to form internal capsule
  43. Caudate + Lentiform nuclei
    aka corpus striatum (striped body)
  44. Epithalamus:
    • forms roof of 3rd ventricle
    • most dorsal portion of diencephalon
    • important structure are the pineal gland and chroid plexus
  45. Chroid plexues
    • collections of capillaries within each ventricle
    • makes CSF
  46. Midbrain consists of:
    cerebral peduncles and copora quadragemina
  47. Meninges of the Brain:
    • Dura mater
    • Arachnoid mater
    • Pia mater
  48. Dura mater:
    • periosteal layer
    • meningeal layer
    • Between them is the Superior Sagital Sinus
    • Below it is the subdural space
  49. Falx cerebri
    extension of meningeal layer that dips into longitudinal fissure and latches to crista galli
  50. Falx cerebelli
    separates the two cerebellar hemispheres
  51. Tentorium cerebelli
    separate the cerebrum from cerebellum
Card Set
Biol Lab
Nervous system