Download The Nervous System

The Nervous System
2 Major Divisions:
Central and Peripheral
Central Nervous System
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Made up of the
brain and spinal
cord
Interprets info
from senses and
relays
commands back
to sense organs,
muscles, and
organs
BRAIN
100 billion neurons
 Hindbrain: contains medulla
(vital and sensory info), pons
(vital and sensory + jaw
movement), and cerebellum
(motor coordination, memory,
balance)
 Midbrain: contains reticular
formation (arousal, sleep/wake,
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BRAIN
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Forebrain: contains
hypothalamus (controls
pituitary, feeding, aggression,
sex drive, pleasure), thalamus
(sensation, movement,
emotions, sleep/wake), limbic
system (emotions, learning,
memory)
Brain—Cerebrum
Cerebral Cortex: covering of the
cerebrum
 75% of the brain’s neurons
 Responsible for higher mental
functions: reasoning, art,
calculations, expression,
language

Hemispheres
 The
cerebrum is divided into
hemispheres that are
connected by the CORPUS
CALLOSUM
 Each hemisphere is divided
into 4 lobes
Lobes
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Frontal: movement, speech,
cognitive processes
Temporal: Hearing, language
comprehension, emotions
Parietal: Skin sensations,
visual/spatial
Occipital: Vision, visual memory
Hemispheric specialization
Each hemisphere functions
differently and controls different
things
 LEFT: Language, speech, verbal
memory, calculation, writing,
right side movement
 RIGHT: Visual/spatial,
shape/face recognition,
emotions, art visual imagery, left
side movement
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Left/Right Brain
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Left/Right Brain video
Left/Right Brain demonstration