Peripheral Nervous System. Homework Study for Jeopardy tomorrow!

Peripheral Nervous System

Homework

Study for Jeopardy tomorrow!

Sensory Division

Cranial NervesOpenings in the skull

Spinal NervesStimulate the rest of the body

Sensory division of peripheral nervous system transmits impulses from sense organs to the central nervous system

Can be categorized by what type of stimulus they respond to…

Sensory ReceptorsType Responds To Locations

Chemoreceptor Chemicals Mouth, nose, blood vessels

Photoreceptor Light Eyes

Mechanoreceptors Touch, pressure, vibrations, and stretch

Skin, hair, ears, ligaments, tendons

Thermoreceptors Temperature Changes

Skin, hypothalamus

Pain Receptors Tissue Injury Throughout the body

Peripheral Nervous System

Stimulus Sensory Receptors

Sensory Neurons

Central Nervous System

Cranial NervesStimulate regions of the brain

12 Cranial NervesOlfactory

Optic

Oculomotor

Trochlear

Trigeminal

Abducens

Facial

Auditory

Glossopharyngeal

Vagus

Accessory

Hypoglossal

Cranial Nerves

Olfactory – Smell, identify familiar scents

Optic – Snellen Test, pen light test

Oculomotor – Raise and lower eyelids

Trochlear – “Follow the finger” closer to face

Trigeminal – Sensation on forehead and cheek

Abducens – “Follow finger” in all directions

Cranial Nerve

Facial Nerve – Smile, frown, raise eyebrow, puff cheeks

Vestibulocochlear – Snap/rub fingers in their ears

Glossopharyngeal – Stick out tongue

Vagus – Ability to speak and swallow

Accessory – Turn head left and right and against resistance

Hypoglossal – Stick out tongue and move tongue side to side

Cranial NervesNum

Name Type Function

I Olfactory Sensory Smell

II Optic Sensory Vision

III Oculomotor Motor Elevation of eyelid

IV Trochlear Motor Upward Eye rolling

V Trigeminal Mixed Chewing, face sensation

VI Abducens Motor Lateral eye movement

VII Facial Mixed Taste, smile, frown

VIII Vestibulochochlear

Sensory Balance, hearing

IX Glossopharyngeal

Mixed Pharyngeal muscle, taste

X Vagus Mixed Gag reflex

XI Accessory Motor SCM muscle

XII Hypoglossal Motor Tongue Movement

Motor Receptors

Motor Division of PNS transmits impulses from CNS to muscles or glands

What is the chain of how a motor neuron responds to a stimulus?

PNS Cycle

Stimulus Sensory receptors

Sensory neuron

Interneuron in Spinal cord

Motor Neuron

Autonomic Nervous System

Regulates involuntary activities

When you run, the ANS speeds up heart rate, increases stimulation of sweat glands and slows down the digestive tract

Homework

Study for Jeopardy tomorrow!