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Nervous System
Notes
Term | Definition |
---|---|
Central Nervous System | brain and spinal cord |
Peripheral Nervous System | peripheral nerves through the body |
Sensory Function | gathers info about changes occurring within and around the body Afferent nerve |
Integrative Function | information is "brought together," interpreted, to create sensations, create thoughts, add to memory, make decisions |
Motor Function | response to signals (impulse) maintain stable conditions Efferent Nerve |
Somatic Nervous System | skeletal muscles |
Autonomic Nervous System | smooth muscles and glands |
Dendrites | form the receptive surfaces of neurons |
Axons | conducts impulse away from the cell body |
Neuroglial Cells | supportive tissue of the nervous system |
Microglial Cells | makes sure no garbage and eats what shouldn't be there Brain & Spinal Cord |
Oligodendrites | produces myelin for CNS Brain & Spinal Cord |
Astrocytes | blood brain barrier Brain & Spinal Cord |
Ependymal Cells | secrete cerebrospinal fluid Brain & Spinal Cord |
Schwann Cells | produces myelin Peripheral |
Mylinated | white matter |
Unmyelinated | grey matter |
Nerve | bundle of nerve fibers |
Meninges | membrane located between bone and soft tissue of the CNS |
Dura mater | outer layer, blood vessels, nerves TOUGH |
Arachnoid mater | no blood vessels WEB LIKE |
Pia mater | contains many nerves and blood vessels to nourish cells of the brain and spinal CONECTING NEURONS |
Cerebrospinal Fluid | circulates between arachnoid and Pia mater |
Cervical Enlargement | supplies nerves to upper limbs (neck) |
Lumbar Enlargement | supplies nerves to lower limbs (lower back) |
CNS Function | conducting nerve impulses, serves as a enter for spinal reflexes |
Ascending Tracts | carries sensory info to the brain |
Descending Tracts | carry motor impulses from the brain to muscles |
Cerebrum | Largest, sensory and motor functions, mental function Memory and reasoning |
Cerebellum | Coordinate voluntary muscles |
Brain Stem | Regulates autonomic functions (Heart rate, blood pressure, and body temp) |