Lab Exam 1: Lab 4- Cranial Nerves & the Eye

What type of info does CN V- Trigeminal carry?

Both sensory & motor

What type of info does V1- Ophthalmic branch carry?

sensory

What type of info does V2- Maxillary branch carry?

sensory

What type of info does V3- mandibular branch carry?

both sensory & motor

Sensory: info from forehead (superior orbital notch), eye, upper eyelid, & nose

V1- Ophthalmic branch of trigeminal

Sensory: info from upper jaw, cheeks/face, upper lip, nasal & oral cavities, & upper teeth

V2- Maxillary branch of trigeminal

Sensory: info from lower jaw & teeth, lower face, lower lip, nasal & oral cavities?

Motor: mastication (chewing)

***General Sensation of anterior 2/3 tongue**

V3- Mandibular

What type of info does CN IX- Glossopharyngeal carry?

Both sensory & motor AND Parasympathetic

what is the main CN controlling the gag reflex? What is another CN that contributes to the gag reflex?

Vagus (motor- pharynx)

Glossopharyngeal (sensory- upper throat)

Sensory: upper throat, carotid sinus pressure, & body O2, posterior 1/3 tongue taste & general sensation

Motor: swallowing (stylopharyngeal muscle)

Parasympathetic: Parotid gland saliva production (for digestion)

CN IX- Glossopharyngeal

What type of info does CN X- Vagus carry?

Both sensory & motor AND Parasympathetic

Sensory: pharynx, larynx, throat, abdomen

Motor: close nasal opening of soft palate while swallowing, pharynx, larynx

Parasympathetic: Gag reflex (vomit, motor pharyngeal), thoracic & abdominal viscera (HR, BR, sweat, bowel movement)

*Main Parasympathetic CN*

CN X- Vagus

what is CN X- Vagus also known as?

the wanderer

Loss of sensation on the right side of the face would be caused by damage to what CN?

CN V- Trigeminal

what cranial nerve is responsible for general sensation in the anterior 2/3 of the tongue?

V3- Mandibular branch of trigeminal

what cranial nerve is responsible for taste in anterior 2/3 tongue?

CN VII- Facial

which CN carry parasympathetic fibers?

III, VII, IX, & X (oculomotor, facial, glossopharyngeal, vagus)

which CN has parasympathetic function of salivation & lacrimation?

CN VII- facial

which CN has parasympathetic function of accommodation (pupil constriction via pupillae sphincter muscles)

eye movements, particularly pupillary constriction

CN III- Oculomotor

which CN has parasympathetic function of salivation via parotid gland?

swallowing & salivary gland

CN IX- Glossopharyngeal

Which CN has parasympathetic function of HR, BR, sweat, & bowel movement?

primary parasympathetic nerve: innervation to thoracic & abdominal organs

CN X- Vagus

Which CN controls the muscles of the neck (trapezius=shrug & sternocleidomastoid=turn head/neck)?

CN XI- Accessory

what cavity is this and what fills it?

posterior cavity

vitreous humor

what cavity is this and what fills it?

anterior cavity

aqueous humor

choroid

what is the order of structures through which a photon passes through the eye?

1. cornea

2. iris

3. pupil

4. lens

5. retina

what structure controls pupil size to determine the amount of light entering the eye (via pupillary muscles) & gives the eye its color?

iris