module 21 Flashcards
90% of where the optic tract fibers go
lateral geniculate nucleus in thalamus –> to V1
other 10% of axons in optic tract go to:
- superior colliculus
- suprachiasmic nucleus
- edinger-westphal nucleus
Superior colliculus
visual reflexes in periphery
suprachiasmic nucleus
presence or absence of light - sleep and wake cycles
(sends message to pineal gland to secrete melatonin)
edinger-westphal nucleus
pupillary reflex and accommodation of lens
palpebral fissure (of eye)
space between upper and lower eyelids
medial and lateral angles
where the upper and lower eyelids meet on the medial and lateral aspects of the orbit
tarsal plate
to maintain their shape as they move over the anterior surface of the eye, the eyelids each contain a layer of connective tissue
tarsal glands
modified sebaceous glands, lubricate surface of eye
palpebral conjunctiva
inner surface of each lid
bulbar conjunctiva
portion of the conjunctiva that covers the anterior eye
conjunctiva
transparent mucous membrane made of primarily stratified squamous epithelium
lacrimal fluid
tears!
Four of the muscles around the eye
superior rectus, medial rectus, inferior rectus, and lateral rectus
where do the muscles around the eye originate
common tendinous ring
contracting the inferior oblique of eye
elevates (rotating superiorly) and abducts the eye
contracting the superior oblique
depresses (rotates inferiorly) and abducts the eye
trochlea
pulley-like piece of cartilage that tnedon of oblique muscles thread through
only muscles innervated by the abducens nerve
lateral rectus
only muscles innervated by the trochlear nerve
superior oblique
four extraocular muscles innervated by
oculomotor nerve
what is contained in the fibrous tunic of the eye
cornea, sclera
what is contained in the vascular tunic of the eye
iris, pupil, choroid, ciliary muscle, dilator pupillae, sphincter pupillae
what is contained in the retina of the eye
pigmented layer, photoreceptors
