A&P Central Nervous System
Terms
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- Five fluid filled cavaties of the brain
- Cerebrum, Diencephalon, Mesencephalon, Pons, Cerebellum, Medulla Oblongata
- Four Lobes of the Brain
- Frontal, Parietal, Temporal, Occipital
- Diencephalon - Thalamus
- Mood, General body movements, senses except smell
- Diencephalon - Subthalamus
- Controls motor functions
- Diencephalon - Hypothalamus
- Maintains Homeostasis, controls BP, HR, Temp, Water, electrolyte regulation, hunger, body weight, sexual development, pituatary gland, movement of intestines
- Diencephalon - Epithalamus
- Functions are unclear.
- Limbic System
- Contains portions of the cerebrum and dicencephalon
- Pineal gland
- controls sleeping/ awakening impulses
- Temporal
- Hearing & memory - short term = based on electrical impulses in brain. long term = actual brain functions (habit)
- Meninges
- surround brain and spinal cord - a set of tree tough membranes that enclose the entire CNS
-
P A D
For Protections -
Piamater - innermost
Arachnoid - second layer
Durameter - outer, toughest - Cerebral Spinal Fluid
- Fluid in which the meninges float
- Plexus - organized intermingling groups of nerves, give rise to peripheral nerves
- Cervical, Brachial, Lumbar, Sacral, Lumbosacral plexus
- Spinal Cord
- at base of brain, composed of bundles of nerve fibers, extends to level of 2nd lumbar vertebra, foramen magnum, cauda equina, vertebral canal, tracts (pathways that contain nerve fibers)
- CSF - cerebral spinal fluid
- For protection, nutrients to internal nervous system structures, regulates ion concentration, pathway for waste products back into the blood