Peripheral Nervous System - Chapter 13

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49 Terms

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Peripheral Nervous System (PNS) - sensory division (afferent)

carries information from the body to the central nervous sytstem

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Peripheral Nervous System (PNS) - motor division (efferent)

carries signals from the CNS to the rest of the body, leading to muscle contraction or glandular secretions

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Somatic Sensory Division

contains neurons that detect sensory stimuli from skin, muscle, joint etc. reponds to stimuli of general senses such as touch, temp and pain, smell, taste, hearing.

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Visceral sensory Division

relay sensory stimuli from the organs of the abdominopelvic and thoracic cavties. detects blood pressure (internal changes) and stretching of organs such as urinary bladder

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Somatic motor division

motor neurons carry signals to skeletal muscles (voluntary movement)

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Visceral motor division (ANS) autonomic nervous system

maintains homestosic by controlling the body’s involuntary motor functions. Nuerons innervate cardiac muscle, smooth muscle cells, and the secreteory cells of glands.

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sympathetic nervous system

“fight or flight” prepares the body for emergency situation; maintians homeostasis when body is doing physical work.

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parasympathetic nervous system

“rest and digest” major role in digestion and maintaining body’s homeostasis at rest.

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What is the mnemonic for the Cranial Nerves?

Oh(I, Olfactory)

Once (II, Optic)

One

Takes

The

Anatomy

Final

Very

Good

Vacations

Are

Happening

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what are the cranial nerves that are involved ONLY in sensory functions?

I, Olfactory (smell). II, Optic (Vision). VIII, Vestibulocochlear( hearing and balance)

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what are the cranial nerves that are primarily involved in muscle movements?

III, Oculomotor (control eye movement and pupil constriction

IV, Trochlear (moves eye downward and laterally

VI, Abducens (moves the eye laterally)

XI, Accessory (control shoulders and neck muscles)

XII, Hypoglossal (control tongue movement)

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What cranial nerves are mixed cranial nerves, those that carry both sensory and motor fibers?

V, Trigeminal (sensation from fase, motor control for chewing)

VII, facial (facial expressions (motor) and taste from the front 2/3 of the tongue (sensory)))

IX, Glossopharyngeal (swallowing (motor) and taste form the back 1/3 of the tongue) (sensory)

X, Vagus (controls internal organs (motor) and provides sensory input from them.

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Q: What is the Roman numeral for the Olfactory nerve?

I

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Q: What is the function of the Olfactory nerve?

Smell detection.

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Q: Is the Olfactory nerve motor, sensory, or mixed?

Sensory

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Q: What is the Roman numeral for the Optic nerve?

II

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Q: What is the function of the Optic nerve?

Vision.

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Q: Is the Optic nerve motor, sensory, or mixed?

Sensory

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Q: What is the Roman numeral for the Oculomotor nerve?

III

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Q: What is the function of the Oculomotor nerve?

Eye movement and pupil constriction

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Q: Is the Oculomotor nerve motor, sensory, or mixed?

Motor

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Q: What is the Roman numeral for the Trochlear nerve?

IV

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Q: What is the function of the Trochlear nerve?

Moves the eye downward and laterally.

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Q: Is the Trochlear nerve motor, sensory, or mixed?

Motor

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Q: What is the Roman numeral for the Trigeminal nerve?

V

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Q: What is the function of the Trigeminal nerve?

Facial sensation and chewing.

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Q: Is the Trigeminal nerve motor, sensory, or mixed?

Mixed

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Q: What is the Roman numeral for the Abducens nerve?

VI

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Q: What is the function of the Abducens nerve?

Moves the eye laterally.

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Q: Is the Abducens nerve motor, sensory, or mixed?

Motor

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Q: What is the Roman numeral for the Facial nerve?

VII

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Q: What is the function of the Facial nerve?

Facial expressions and taste (front 2/3 of tongue).

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Q: Is the Facial nerve motor, sensory, or mixed?

Mixed

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Q: What is the Roman numeral for the Vestibulocochlear nerve?

VIII

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Q: What is the function of the Vestibulocochlear nerve?

Hearing and balance.

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Q: Is the Vestibulocochlear nerve motor, sensory, or mixed?

Sensory

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Q: What is the Roman numeral for the Glossopharyngeal nerve?

IX

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Q: What is the function of the Glossopharyngeal nerve?

Taste (back 1/3 of tongue) and swallowing.

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Q: Is the Glossopharyngeal nerve motor, sensory, or mixed?

Mixed

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Q: What is the Roman numeral for the Vagus nerve?

X

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Q: What is the function of the Vagus nerve?

Controls heart, lungs, digestion, and voice.

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Q: Is the Vagus nerve motor, sensory, or mixed?

Mixed

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Q: What is the Roman numeral for the Accessory nerve?

XI

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Q: What is the function of the Accessory nerve?

Shoulder and neck movement.

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Q: Is the Accessory nerve motor, sensory, or mixed?

Motor

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Q: What is the Roman numeral for the Hypoglossal nerve?

XII

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Q: What is the function of the Hypoglossal nerve?

Tongue movement.

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Q: Is the Hypoglossal nerve motor, sensory, or mixed?

Motor

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A: Motor

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