Muscle Locations Anatomy Unit 3

orbicularis oculi

- controls eyes

- sphincter

- orbital- below eyebrow

- palpebral- eyelid

depressor anguli oris

- pulls angle of mouth downward

- origin base of mandible

rhomboid major and minor

- diamond shaped

- square your shoulders

levator scapulae

elevates scapula

serratus posterior inferior

depress ribs

splenius capitis

- above

- keep head up

- extend neck and move R and L

quadratus femoris

vastus complex

buccinator

chewing

Pectoralis minor

hold scapula in place so we don't flap like a bird

rectus femoris

nasalis

- sides of nose

- paired

procerous

- inserts between eyebrows

- depresses eyebrows

- wrinkles

mentalis

- muscle mass of chin

- pout

zygomaticus major

- helps raise the angle of the mouth

- dimples

zygomaticus minor

- facial expression

- upper lip

- smiling

- ridges

levator labii

elevates teeth

orbicularis oris

- purse lips

- wind instrument

auricular muscles

- multiple

- move ear

- when move eyes, ears perk up

trapezius

- elevates and rotates scapula

- raise your hand

latissimus dorsi

- lots of movement

- extension, adduction, rotation

serratus posterior superior

elevate ribs

splenius cervicis

- below

- keep head up

- extend neck and move R and L

erector spinae muscles

- bending forward

- covered by sheath

Iliocostalis

- lateral

- extend and bend vertebral column and head

longissimus

elongate spine

Transversospinalis

- spinal column extension (reach)

- rotation

semispinalis

crossing over effect that allows rotation from side to side

multifidus

- triangular and covers 2 vertebrae at once

- support

rotatores

- long and short

- spindles that are sensitive to stretch

levatores costarum

interspinales

suboccipital muscles

- extends head

- suboccipital triangle

- where vertebral artery and nerve come together

Pectoralis major

- adduction, flexion, rotation

- moves arm

subclavius

- anchor scapula

- subclavian groove- artery and nerve run through

intercostal muscles

- 11 pairs

- movement and protection of ribs (ribcage)

external obliques

- rotate

- keep contents stable

- lacunar ligament

Linea alba

midline (helps during surgery)

lacunar ligament

long ligament that runs through external obliques and pelvic area

internal obliques

runs straight across and perpendicular

transverse abdominus

- compression

- keep upright

rectus abdominus

- 6 pack

- rectus sheath- arcuate line

pyramidalis

deltoid

supraspinatus

infraspinatus

teres major, minor

coracobrachialis

biceps branchi

brachialis

triceps

supinator

pronator

flexor digitorum

Flexor pollicis longus, brevis

gluteus muscles

piriformis

obturator internus

gemellus

sartoris

biceps femoris

semitendinosus

semimembranosus

gastrocnemius

soleus

plantaris

popliteus

tibialis posterior

flexor hallucis longus

flexor digitorum longus