X A&P - Chp 10 - Nervous system, brain and cranial nerves Flashcards
Lymbic System
emotions
Cerebrum
- largest, most superior portion of brain
- Cortex (outer layer),conscious thoughts, memory, reasoning, abstract mental functions
- thinking part of brain
Diencephalon
- between cerebrum and brainstem
- contains thalmus and hypothalmus
Thalmus
-sorts and redirects sensory input (busy secretary)
aka
-relays to the cerebral cortex information received from diverse brain regions
-receives auditory, seomatosenroy, and visual sensory signals
Hypothalmus
- emotion & aggression
- maintains homeostasis
- controls autonomic nervous system
- controls pituitary gland
- autonomic
Cerebellum
- balance and muscle tone
- voluntary muscle
Meninges
- Pia Mater (closest to brain)
- Arachnoid (capillaries, netting, CSF
- Dura Mater (cerebral fluid re-absorbed into blood stream, keeps it in brain)
Brainstem
connects cerebrum and dienceiphalon w spinal cord
Midbrain
(below center of cerebrum)
vision (moving eye) /hearing
Pons
(connects cerbellus w other parts of brain)
-regulates RESPIRATION
Medulla Oblongata
- vital functions, respiration and heartbeat
- deep in brain and really protected
CSF
support nervous tissue, cushion shock, carry nutrients, transports waste products from cells
Ventricles
CSF forms in spaces, ventricles
Choroid Plexus
vascular network in each ventricle. forms CSF by filtration of blood and cellular secretion
Gyri (gyrus)
elevated portions of folds in brain
Sulci (sulcus)
shallow grooves in folds of brain
Basal nuclei
basal ganglia
masses of gray matter deep in brain, work with cerebral cortex to regulate body movement and muscles of facial expression
what does Basal ganglia secrete ????
Dopamine
- a neurotransmitter that helps control brain’s reward & pleasure centers.
- helps regulate movement & emotional responses, and enables us not only to see rewards, but to take action to move toward them.
- people with low dopamine activity may be more prone to addiction.
Cerebral Cortex parts
- Frontal Lobe - primary motor area, control of skeletal muscles
- Parietal Lobe - primary sensory area
- Temporal Lobe - auditory/olfactory
- Occipital Lobe - interpreting impulses arising from retina of eye.
Wernicke area
-Speech comprehension
Broca area
-motor speech area
Limbic System
emotional state and behavior, formation of short term memories