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44 terms

Ch 7 The nervous system

The Brain
STUDY
PLAY
Brain Stem
Controls Blood pressure, heart rate, breathing, swallowing & vomiting
Medula Oblangata
Important Reflexes- Cardiac Center (autonomic)
Pons
Relay Center - Breathing
Midbrain
Reflex Center - turn ears & eyes movement
Interbrain (diencephalon) (3) parts
Thalamus, Hypothalamus, Epithalamus
Thalamus
emotion, touch, temp, pain / pleasure
Where does the Thalamus send message
sense organs > cerebrum
Hypothalamus
Homeostasis> body temp, water balance, metabolism, appetite, emotions, pain/pleasure
Epithalamus
Pineal gland - melatonin (helps you sleep) also Choroid Plexus - forms CSF
Cerebellum
(2) hemispheres, tree of life, balance, muscle tone & coordination (arbor vitae) white matter inside gray
Cerebrum
Thinking part of the brain, (2 hemispheres L & R)
Separated by longitudinal fissure outer gray cortex
Surface area of Cerebrum
Gyri - Ridges ; Sulci - Grooves ; Fissures - Deeper grooves
Cerebral Dominance - Right
Spatial, Holistic, Creativity
Cerebral Dominance - Left
Orderly, Linguistic, Analytical (likes math) Logical
Cerebrum - Corpus Callosum
Band of neurons (coordinated 2 hemispheres)
Cerebrum - Cerebral Functions
Conscious thought, Voluntary movement, reasoning & emotions, speech, memory, intelligence
Men have a smaller ________ ?
Corpus Callosum (why they don't like to talk about feelings)
Cerebrum Lobes (5)
Frontal, Parietal (sides), Occipital (visual), Temporal (memory areas & auditory) Olfactory (smell)
Frontal lobe
Intellect, personality, cognition, problem solving, language, motor, (prefrontal)
Olfactory Lobe
Smells (located bottom of frontal lobe)
Occipital Lobe
Visual
Temporal Lobes
Auditory & memory area
Parietal Lobes (Sides)
Sensory, Temperature, touch
Primary Motor Area is where on the brain?
On Top
____ pairs of spinal nerves
31
Structure of the spinal cord
Consists of White & Gray Matter, 31 Spinal nerves
Cranial Nerves - Olfactory
(I) - Smell
Cranial Nerves - Glossopharyngeal
(IX) - saliva, swallow, lacrimal,
Cranial Nerves - Vagus
(X) - Digestive, peristalsis, heart slows, ie heart helps lungs to function properly
Cranial Nerves - Accessory
(XI) - neck & back muscles - help you breathe
Cranial Nerves - Hypoglossal
(XII) - tongue - helps you to swallow
Trama - Concussion
slight brain injury - no perm brain damage
Trama - Contusion
Nervous tissue destruction occurs, Nervous tissue does not regenerate
Trama - Cerebral Edema
Swelling from the inflammatory response - may compress and kill brain tissue
Degenerative - Cerebrovascular accident
Stroke - 3rd leading cause of death in us, Ischemia: lack of oxygen; transient ischemia attacks
Ischemia
lack of oxygen
Degenerative - Alxheimer's disease
Plaque & tangles in the brain
Degenerative - Sclerosis
Myelin is destroyed and replaced w/scar tissue
Degenerative - Cerebral Palsy
tempory lack of oxygen, brain damage, lack of muscle control, paralysis
Gray Matter does not __________
Regenerate
Neurilemma helps in ___________
Regeneration - (White matter)
Autonomic Nervous System (2)
Sympathetic & Parasympathetic
(ANS) Sympathic
Fight or Flight (norepinephrine) (thoracolumbar)
(ANS) Parasympathetic
Rest & Digest (Craniasacral), Vagus nerve (acetylcholine)