Oligodendrocyte wraps its membrane around the axons

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Oligodendrocyte Wraps its membrane around the axons in concentric circles to form myelin, a white and shiny fatty substance, in the CNS. This squeezes out all the cytoplasm from that region, leaving only the lipid-bilayer. This vastly improves electrical conduction in the axon (see Neuronal Signaling section) Offer nourishment to the neurons Wraps itself around several axons at once. See cross section cutting vertically through three
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axons and an oligodendrocyte Many are needed to cover the whole length of an axon. Ependymal cells They kind the walls of the ventricles and produce CSF. Schwann Cells Like oligodendrocytes, they form myelin sheaths around axons, but in the PNS. A Schwann cell wraps itself around only one axon 3. What are the basic structural elements of the brain and what are their functions? The brain has three main parts, the cerebrum , the cerebellum , and the brain stem . The brain is divided into regions that control specific functions. THE CEREBRUM: Frontal Lobe Behavior Abstract thought processes Problem solving Attention Creative thought Some emotion Intellect Reflection Judgment Initiative Inhibition Coordination of movements Generalized and mass movements Some eye movements Sense of smell Muscle movements Skilled movements Some motor skills Physical reaction Libido (sexual urges) Occipital Lobe Vision Reading Parietal Lobe Sense of touch (tactile senstation) Appreciation of form through touch (stereognosis) Response to internal stimuli (proprioception) Sensory combination and comprehension Some language and reading functions Some visual functions
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Temporal Lobe Auditory memories Some hearing Visual memories Some vision pathways Other memory Music Fear Some language Some speech Some behavior and emotions Sense of identity Right Hemisphere (the representational hemisphere) The right hemisphere controls the left side of the body Temporal and spatial relationships Analyzing nonverbal information Communicating emotion Left Hemisphere (the categorical hemisphere) The left hemisphere controls the right side of the body Produce and understand language Corpus Callosum Communication between the left and right side of the brain THE CEREBELLUM Balance Posture Cardiac, respiratory, and vasomotor centers THE BRAIN STEM Motor and sensory pathway to body and face Vital centers: cardiac, respiratory, vasomotor Hypothalamus Moods and motivation Sexual maturation Temperature regulation Hormonal body processes Optic Chiasm Vision and the optic nerve Pituitary Gland Hormonal body processes Physical maturation Growth (height and form) Sexual maturation Sexual functioning Ventricles and Cerebral Aqueduct Contains the cerebrospinal fluid that bathes the brain and spinal cord
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4. Describe the anatomy of the spino-thalamic (superficial sensation) and deep sensation tracts.
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  • Winter '18
  • Jane doe

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