Neuroanatomy Labs 3 & 4

frontalis muscle

raises eyebrows

orbicularis oculi muscle

around the eye, closes the eyelids

levator labii superioris muscle

elevates upper lip

levator anguli oris muscle

raises the angle of the mouth (look for muscle going to angle of mouth)

zygomaticus major muscle

contributes to laughing and smiling (pulls angles of mouth superolaterally)

depressor labii inferioris muscle

depresses inferior lip

depressor anguli oris

depresses angle of mouth (look for muscle going to angle of mouth)

buccinator muscle

used for blowing air & positioning food when chewing

orbicularis oris muscle

closes lips, used for speech, eating, kissing, playing instruments, puckering

platsyma muscle

moves the mandible down

parotid gland

parotid duct

empties saliva

temporal branch of facial nerve

zygomatic branch

buccal branch of facial nerve

mandibular branch of facial nerve

cervical branch of facial nerve

infraorbital neurovasculature (continuation of CN V2)

what bundle of nerves, arteries, and veins go through here?

facial artery

mental neurovasculature (continuation of infraorbital neurovasculature)

what bundle of nerves, arteries, and veins go through here?

body of mandible

mental foramen

inferior alveolar neurovasculature become mental neurovasculature here

ramus of mandible

coronoid process

condylar process

mylohyoid line (mylohyoid muscle attachment site)

mandibular canal

temporalis muscle

closes mouth, innervated by V3

masseter muscle

innervated by V3

medial pterygoid muscle

elevates mandible, closes mouth, innervated by V3

lateral pterygoid muscle

opens mouth, innervated by V3

maxillary artery

superficial temporalis artery

deep temporal arteries

middle meningeal artery

inferior alveolar artery

inferior alveolar nerve

branch of V3

nerve to mylohoid

branch of inferior alveolar nerve

lingual nerve

Branch of V3, which supplies sensory innervation to the anterior 2/3 of the tongue

chorda tympani (joins lingual nerve)

Mandibular nerve (V3)

retromandibular vein

levator palpebrae superioris muscle

elevates upper eyelid, opens eye

superior rectus muscle

elevates eye

superior oblique muscle

depresses eye and turns it laterally

medial rectus muscle

moves eye medially

lateral rectus muscle

moves eye laterally

inferior rectus muscle

depresses eye

inferior oblique muscle

elevates eye and turns it laterally

optic nerve

label the big yellow nerve projecting off the back of the eye

oculomotor nerve eye

which nerve innervates the superior rectus, medial rectus, inferior rectus, levador palpabrae superioris, and inferior oblique (sorry, couldn't find a good picture of this on the internet)

trochlear nerve orbit

Which nerve?

Frontal nerve (V1)

Supratrochlear nerve

Label Nerve 1

Supraorbital nerve

Label Nerve 2

Supraorbital nerve

ophthalmic artery orbit

Name the artery that supplies the blood to the eye

superior ophthalmic vein

Lacrimal nerve (V1) & gland

Label the gland and the nerve that innervates it

spinal epidural space

spinal dura mater

spinal subarachnoid space

spinal subarachnoid space

denticulate ligaments

dorsal rootlets

dorsal root

ventral rootlets

ventral root

dorsal root ganglion

conus medullaris

cauda equina

below cona medullaris

filum terminale

anchors spinal cord to coccyx

lumbar cistern

subarachnoid space inferior to conus medullaris

dorsolateral sulcus

Entry zone for the dorsal roots

dorsolateral sulcus

Entry zone for the dorsal roots

Dorsomedian Sulcus

between dorsal columns

Dorsomedian Sulcus

between dorsal columns

dorsal intermediate sulcus

Groove on the dorsal surface of the rostral part of the spinal cord, between the gracile and cuneate fasciculi, contains posterior spinal arteries

dorsal intermediate sulcus

Groove on the dorsal surface of the rostral part of the spinal cord, between the gracile and cuneate fasciculi, contains posterior spinal arteries

dorsomedian sulcus, dorsal intermediate sulcus, dorsolateral sulcus

ventral median fissure

contains anterior spinal artery

ventral lateral fissure

Ventral root exit here