Basic Division of Nervous System
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What is sensory input?
gather information from environment
process the information
stimulate body to respond appropriately
What is the nervous sytem designed to do?
- sensory input - gather information from environment
- integration - process it
- motor output - stimulate body to respond appropriately
What is CNS and PNS?
CNS - brain & spinal cord (both are protected by bone)
- PNS - all nerves exiting spinal cord & innervate body
- * two subdivisions
- - autonomic NS - sends impulses to control involuntary actions
- - Somatic NS - sends impulses to control voluntary actions
What is Autonomic NS?
branch sending impulses controlling involuntary actions
What is Somatic NS?
branch sending impulses controlling voluntary actions
Afferent Signal, Integration, & efferent signal
afferent signal - when stimulus is detected by NS, impulse is sent to brain
integration - brain receives information & proceses it
efferent signal - When the impulse sends out a response, it is sent to the body
efferent impulses reaching skeletal muscle (voluntary movement)
branch innervating pharyngeal muscles
nerves carrying efferent impulses reaching internal organs & regulating involuntary muscle contractions
afferent impulses originating from non-visceral areas such as skin & muscle
Two types of somatic sensory
proprioceptive senses - sends sensory information from muscle, ligaments, tendons, & indicate body position
Special somatic senses - localized receptors such as those of ear & eyes
sends sensory information from muscle, ligaments, tendons, & indicate body position
Special somatic senses
localized receptors such as those of ear & eyes
afferent impulses generated by internal organs (ex. taste buds)
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