[UNFINISHED] ANAT Lab 4

Muscles of the axial skeleton and pectoral girdle

Occipitofrontalis muscle

whole region

Frontal belly; Occipitofrontalis muscle

forehead red part

Occipital belly; Occipitofrontalis muscle

back of head behind ear

Epicranial aponeurosis

white part

Temporoparietalis muscle

above ear #39

Temporalis muscle

deep to temporoparietalis muscle

only on tiny muscle (bigger) ..huh

Auricularis posterior muscle

small behind ear

Auricularis anterior muscle

small in front of ear 

Orbicularis oculi muscle

#25 wrap around eye

Nasalis muscle

#27 on the nose

Corrugator supercilii muscle 

thin, btwn orbic. and lev labii sup ala nasi muscle 

Levator labii superioris muscle 

#29 on the nose 

Levator labii superioris alaeque nasi muscle

thin, edge of nose, next to lev lab sup

Zygomaticus minor muscle

#30 under eye

Zygomaticus major muscle 

under minor 

Orbicularis oris muscle

around mouth

Depressor anguli oris muscle

more superficial

sides close to chin but not closest to chin

Depressor labii inferioris muscle 

more deep, closest to chin 

Buccinator muscle

#35 small piece below zygo…

Masseter muscle

#38 next to cheek fat

Risorius muscle 

fingerlike projections from ear to chin 

Mentalis muscle

2 bumps chin

Superior rectus muscle

top of eye

on the smallest eye = near grain

Inferior rectus muscle 

bottom of eye going front to back 

Lateral rectus muscle

farther from nerve; smallest eye = side without lacrimal sac

Medial rectus muscle

closer to nerve

smallest eye = has lacrimal sac

Superior oblique muscle 

left to right 

points to medial rectus muscle 

under superior rectus m. 

can’t see on smallest model

Inferior oblique muscle

under eye left to right

can see on smallest model

Sternocleidomastoid muscle 

big 

from ear to clavicle 

two side by side blobs on cross section 

Geniohyoid muscle

small near chin

next to two bumps

Digastric muscle

#43 tiny part to ear

Styloglossus muscle 

connected to tongue 

Stylohyoid muscle

#44 next to digastric muscle

Mylohyoid muscle

above digastric

Sternohyoid muscle 

#46 

between SCM and sterthy

Sternothyroid muscle

not as visible, behind sternohyoid

#47

Omohyoid muscle

thin under SterClaMas M.

Genioglossus muscle 

flatboard 

muscle below tongue 

Anterior scalene muscle

#55

Middle scalene muscle

#54

Posterior scalene muscle 

#53

Levator scapulae muscle

#52 farther back

Splenius capitis muscle

#51

Semispinalis capitis muscle 

no #

farthest back 

smallest triangle

Trapezius muscle

triangle

head shoulder back

Latissimus dorsi muscle

side ribs

Intertransversarius muscle 

between transverse processes of spine 

titan only

Rotatores muscle

more on back, on the spine kinda

titan only

Interspinalis muscle 

between spinous processes 

titan only 

Erector spinae muscle group

only on tiny model #62

up and down next to spine left side

Pectoralis major muscle

big outermost layer

cross section lowest

Pectoralis minor muscle

under major

cross section above major

Serratus anterior muscle 

under minor 

cross section above minor 

#61

Intercostal muscle

between ribs 

Transversus thoracis muscle

connected to ribs

Diaphragm muscle

diaphragm yk yk

External oblique muscle 

pec major same layer 

@ abdomen sides 

Internal oblique muscle

pec minor same layer

@ abdomen sides

Transversus abdominis muscle

inside of abdomen

striations left to right

under diaphragm

between internal oblique and rectus abs

Rectus abdominis muscle

abs!

deepest under transversus abs

Tendinous inscriptions 

lines that separate abs left to right, by row 

Linea alba

line separates abs up and down, by column

Pyramidalis muscle

bottom of linea alba

triangles

Quadratus lumborum muscle 

under diaphragm + kidney 

12th rib and lumbar vertebrae to iliac crest