Cranial nerves Flashcards
which cranial nerves are purely sensory?
1 Olfactory, 2 Optic, 8 Vestibulocochlear
which cranial nerves are purely motor?
3 Oculomotor, 4 Trochlear, 6 Abducens, 11 Accessory, 12 Hypoglossal
which cranial nerves have mixed sensory and motor function
5 Trigeminal, 7 Facial, 9 Glossopharyngeal, 10 Vagus
which cranial nerve carry parasympathetic fibres?
3 Oculomotor, 7 Facial, 9 Glossopharyngeal, 10 Vagus
what is the main function of cranial nerve 1 (Olfactory) and the location of its neurons?
Sense of smell - in the nasal epithelium
what is the main function of cranial nerve 2 (optic) and the location of its neurons
Sense of sight - in the retina
what is the main function of cranial nerve 8 (vestibulocochlear) and the location of its neurons
Hearing and balance - in the spiral ganglion and the vestibular (scarpas) ganglion
what is the main function of cranial nerve 3 (Oculomotor) and the location of its neurons
eye movements - in the midbrain
what is the main function of cranial nerve 4 (trochlear) and the location of its neurons
eye movements - in the midbrain
what is the main function of cranial nerve 6 (abducens) and the location of its neurons
eye movements - in the pons
what is the main function of cranial nerve 11 (accessory) and the location of its neurons
motor to specific neck muscles (trapezius & sternocleidomastoid) - in the spinal cord
what is the main function of cranial nerve 12 (hypoglossal) and the location of its neurons
motor to tongue - in the medulla
what are the main functions of cranial nerve 5 (trigeminal) and the location of its neurons
general sensory = head neck face - throughout the brainstem.
motor = mastication muscles - in the pons
what are the main functions of cranial nerve 7 (facial) and the location of its neurons
special sensory = gustation - throughout brainstem
motor - facial expression muscles - in the pons
what are the main functions of cranial nerve 9 (glossophayngeal) and the location of its neurons
special sensory = gustation
general sensory = tongue and pharynx - through brainstem
motor = part of pharynx - in the pons
what are the main sensory and motor functions of cranial nerve 10 (vagus) and the location of its neurons
special sensory = gustation - throughout brainstem
Motor = part of larynx, pharynx - in the medulla
which cranial nerves carry taste
7, 9 and 10
where do the parasympathetic nerves of the oculomotor (3) nerve go to
to the eye
where do the parasympathetic fibres of the facial (7) nerve go to
Nasal and salivary gland
where do the parasympathetic fibres of the glossopharyngeal (9) nerve go to
salivary glands
where do the parasympathetic fibres of the vagus (10) nerve go to
heart, lungs, GI tract
what two places do cranial nerves arise form
forebrain (1&2) and brainstem (3-12)
what do cranial nerves exit the skull through
foramina (holes)
in what ways are cranial nerves different from spinal nerves
they follow a different pattern and have different architecture
what structure contains all the cranial nerve nuclei
Brainstem
