CN Classification GT

What are nuclei

Collection of like cell bodies in CNS

Where are CN nuclei located

Midbrain, pons, medulla, and spinal cord

Which neuron type is moving from the periphery towards the brain

Afferent (sensory)

Which neuron type is moving from the brain to the periphery

Efferent (motor)

In general what is the pathway of an afferent CN

Peripheral receptor --> hole (typically) --> Nuclei --> sensory cortex in brain

In general what is the pathway of an efferent CN

Motor cortex of the brain --> Nuclei --> hole (typically) --> peripheral effector

What is the function of the foramina (holes in the head)

To allow passage way for nerves and arteries; for things coming into brain and things leaving brain

What is a good place to start in terms of knowing the general functions of the CNs

Some, say, marry, money, but, my, brother, says, big, boobs, matter, more

Which CNs are Sensory ONLY

Cranial Nerve I,II, VIII = olfactory, optic, vestibulocochlear

Which CNs are Motor ONLY

Cranial nerve III,IV,VI,XI,XII = oculomotor, trochlear, abducens, spinal accessory, hypoglossal

Which type of classification, efferent or afferent, generally refers to involuntary structures- smooth muscle of viscera, glands, etc

visceral efferent

Which type of classification, efferent or afferent, generally refers to skin and skeletal muscles, tendons, and joints

somatic afferent

Which type of classification refers to the senses

special

General is

afferent/efferent

Special is

senses

Somatic is

to or from skin and skeletal muscle

Visceral is

to or from smooth muscle, cardiac muscles, glands

Which type of special CNs will rely on CHEMORECEPTORS

afferent special viscera

Which type of special CNs will rely on specialized receptors such as photoreceptors

special sensory afferent

What is the CN classification for CNs
serving hearing and vision

special sensory afferent

What is the CN classification for CNN receiving input from peripheral receptors from involuntary smooth muscles or glands

general visceral afferent

What is the CN classification for CNs receiving input from skin receptors or mechanical receptors in skeletal muscles

general somatic afferent

What is the CN classification for CNs sending information to smooth muscle of viscera, cardiac muscle, and glands

General Visceral Efferent via preganglionic parasympathetic axons

What is the CN classification for CNs sending information to the muscles of mastication, facial expression, and pharyngeal muscles (swallowing)

special visceral efferent

How many cranial nerves are there

12

CN I

olfactory n

CN II

optic n

CN III

oculomotor n

CN IV

trochlear n

CN V

trigeminal n

CN VI

abducens n

CN VII

facial n

CN VIII

vestibulocochlear n

CN IX

glossopharyngeal n

CN X

vagus n

CN XI

spinal accessory n

CN XII

hypoglossal n