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| schwan cells in the PNS and neuroglia in the CNS-->astrocytes,oligodendrocytes, microglia, ependymal cells |
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| cell bodies embedded in neuropil cytoplasmic processes + glial cells |
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| central portion of chord, brain stem cortical tissue of brain |
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| long processes of neurons (predominantly myelinated) plus glial cells, functionally related groups in tracts; deep areas of the cerebrum and cerebellum and peripheral spinal chord |
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| deep areas of cerebrum and cerebellum, peripheral spinal chord |
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| medulla, pons and midbrain |
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| perikaryon, with lots of ribosomes and easily identifiable centrally located nucleus, Dendrites carrying stuff to cell body, axon with recurrent colalteral branch going back to the perikaryon, oligodendrocyte |
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| continuation of axon and boutons, schwann cell |
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Term
| Multipolar, unipolar, bipolar, pseudounipolar, describe morphology |
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Definition
M -- multiple dendrites/ 1 axon
U -- no dendrites/1 axon
B --1 dendrite + 1 axon
P-- somatic sensory/modified unipolar/axon + dendritic process... |
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| pyramidal cell, purkinje cell (cortex of the cerebellum), lower motor neurons(brainstem--> LMN assoc with cranial nerves) |
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| Stellate cell, cell of martinotti, granule cell, horizontal cell |
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| LMN in ant horn of spinal chord.. what are the black dots> |
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| cerebral cortex; axon directed towards cortical surface; resembles stellate |
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| cerebral cortex; axon ends on one or more cells of the area |
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| cerebral cortex; long axis is parallel to cortical surface; also in retina |
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| betz cells of motor area of cerebral cortex; single apical dendrite going up towards surface, horizontal dendrites; and single axon going deep |
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| white matter, granular layer, purkinje cells, molecular layer |
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| deepest of three layers in cerebral cortex |
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| cerebellar cortex; flask shaped; 1 to 2 dendrites extend towards surface with lots of branching; axon from base goes deep in cerebellum |
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| axon in the CNS is myelinated by |
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| portions of several oligodendritic cells |
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| Neuroglia in anterior horn in spinal chord |
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Definition
| oligodendrocytes have a round nucleus, and astrocytes have irregular shaped nucleii |
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| nuclei are much larger and more irregular than other glial cells; project processes in many directions; pink staining with lots of cytoplasmic processes, have feet that attach to the capillaries, help make up the blood brain barrier; astrocyte feet; support and transport; fibrous (white matter) protoplasmic (grey matter) |
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| tiny cells that are believed to be involved in phagocytosis, small and flattened; in CNS they are resting or reactive |
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| line the central canal and are cuboid or columnar, involved in the production of CSF and also line the ventricles; ependyma are ciliated only in ventricles |
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| space between the neurons, similar to ground substance of connective tissue (glycosaminoglycans); conglomerate of cell bodies and processes of astrocytes and neuronal processes (generally unmyelienated) |
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| describe perikaryon nucleus |
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Definition
central (except for ANS)
lots of euchromatin
single large nucleolus in center |
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| rough ER mixed with lots of free ribosomes; after injury there is nissel substance dissolves; only in perikaryon and dendrites |
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| in the perikaryon; most abundant in the substantia nigra |
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| describe the two different collateral branches of an axon |
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Definition
| recurrent (back to perikaryon) and and right angles |
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| what angle do dendrites branch? is there dendritic transport? |
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| 90 degrees; yes, but little is known about it |
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| Golgi Type I; 135 um, pyramidal, purkinje, lower motor neurons |
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| anterior horn of spinal chord; motor nuclei of cranial nerves |
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| Golgi type II; many more in number thath type I; interneurons too; stellate, cell of martinotti, granule cell, horizontal cell |
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| spherical dense nucleus; numerous processes that wrap portions of axons; one oligo wraps many axons; one axon is wrapped by many oilgos |
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