Divisions of the Nervous System

1. Central Nervous System - relays messages and information

1.1. Brain - where impulses flow and originate

1.1.1. Cerebrum - Largest part of brain; controls voluntary activities

1.1.1.1. Frontal Lobe - voluntary movement, intellect, learning,recall, judgement, reasoning, planning,and personality

1.1.1.2. Parietal Lobe - perception of stimuli

1.1.1.3. Occipital Lobe - vision

1.1.1.4. Temporal Lobe - perception and recollection of auditory stimuli, taste, and smell

1.1.2. Cerebellum - second largest region of brain; coordinates and balances muscle action

1.1.3. Brain Stem - connects brain and spinal cord

1.1.4. Thalamus - receives information and passes it to the proper places

1.1.5. Hypothalamus - recognition of hunger, thirst, anger, etc.

1.2. Spinal Cord - maintain communication between brain and rest of body

2. Peripheral Nervous System

2.1. Sensory Division - transmits impulses from sense organs to CNS

2.2. Motor Division - transmits impulses from CNS to muscles or glands

2.2.1. Somatic Division - regulates activities under concious control

2.2.2. Autonomic Division - regulates involuntary activity

2.2.2.1. Sympathetic Nervous System - fight or flight

2.2.2.2. Parasympathetic Nervous System - rest and digest