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Nervous System - Coggle Diagram
Nervous System
Neuron Classifications
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Multipolar Neurons: Has many dendrites and an axon rising form the cell body: Most neurons with cell bodies in the CNS are multipolar.
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Tissues
Neuroglia: Cells that support neurons through nourishment, protection, and insulation
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Microglia: Function as phagocytes for bacterial cells and cellular debris, and produces scar tissue
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BRAIN
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Brainstem: Coordinates and regulates visceral activities, and connects different parts of the nervous system
Cerebrum: Largest part of the brain; associated with higher brain function, and sensory and motor functions
SPINAL CORD
Function
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Major Functions: transmit impulses to and from the brain, and house spinal reflex
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Structure
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Lumbar enlargement: A thickened area near the bottom of the spinal cord that provides nerves to the lower limbs
Cervical enlargement: A thickened area near the top of the spinal cord that provides nerves to the upper limbs
White matter: Made of bundles of myelinated fibers, surrounds a core of grey matter that provides housing to interneurons and neuron cell bodies
Cuada Equina: structure formed near the end of the spinal cord; consists of spinal nerves in lumbar and sacral area
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AUTONOMIC NERVOUS SYSTEM
Parasympathetic divisions: Activates under regular, restful conditions(rest and digest).
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CRANIAL NERVES
- The first pair arises from the cerebrum, and the second from the thalamus, but most arise from the brainstem
- Most are mixed nerves, containing sensory and motor nerve fibers, but some are only sensory, while others are primarily motor
- The twelve pairs are designated by name and number; the numbers are in order, from superior to inferior
- There are twelve pairs of cranial nerves that arise from the underside of the brain
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