Medulla oblongata

Medulla oblongata is a continuation of the

Spinal cord

What tracts does the medulla oblongata contain

Ascending sensory tracts, descending motor tracts

What “centers” are in the medulla oblongata

Cardiovascular center (heart rate, blood pressure), respiratory rhythmicity centers (breathing, inspiration exhalation)

How many cranial nerves are in the medulla oblongata

5 (8-12)

Identify nerve #12

hypoglossal nerve

What type of nerve is the hypoglossal nerve

Primarily motor nerve efferent

Functions of hypoglossal nerve

Tounge movements of speech, food manipulation, swallowing

Damage to hypoglossal nerve may cause

impaired speech and swallowing, inability to protrude tounge if both nerves are damaged

What type of nerve is the accessory nerve ?

Motor, efferent

Functions of accessory nerve

Swallowing, head, neck and shoulder movements

Damage to accessory nerve may cause:

impaired movements of head, neck, and shoulders, difficulty shrugging shoulders

Nerve 10 is called

Vagus nerve

Nerve 12 is callled

Hypoglossal nerve

Nerve 11 is called

Accessory nerve

Function of vagus nerve

Sensory function; taste; sensation of hunger, motor function, swallowing, speech, decleration of heart, bronchoconstriction

Vagus nerve is a ___ nerve

mixed

Accesory nerve is a ___ nerve

motor

nerve 9 is called

glossophaaryngeal nerve

glossophaaryngeal nerve is a __ nerve

mixed

glossophaaryngeal nerve function

sensory function; taste, touch, pressure, pain, tempature sensation from tounge and outer ear motor function salivation swallowing gagging

Effect of damage of glossophaaryngeal nerve

loss of bitter and sour taste, impaired swallowing

What is nerve number 8

vestibulocochlear nerve

what type of nerve is the vestibulocochlear nerve

sensory nerve

Function of vestibulocochlear nerve

hearing and equillibrium

damage to vestibulocochlear nerve

deafness, dizzines, loss of balance

damage to vagus nerve is

fatal

vagus is a mixed nerve