Muscular system Flashcards
Sternocleidomastoid
Sternum, clavicle, mastoid
side of neck
- turning and flexing neck
- head down
occipitofrontalis
-back by occipital
-frontal
-moves eyebrows
-facial expression
-moves scalp
Orbicularis oculi
-around eye
-close eye so hard it protects it
-winks
orbicularis oris
-around mouth
-pucker up/pursed
-kiss
Buccinator
-cheek
-compresses cheeks to move food
Zygomaticus
-cheek bone - corner of mouth
-smile
Depressor anguli oris
-frowning
-below lower lip (anchored on chin)
masseter
-chewing muscle
-by mandible - back of jaw - back of cheek
intercostalis (internal)
between ribs
deeper-forced inhale
intercostalis (external)
-inhale
-bottoms of ribs to tops (moves up)
Erector spinae
-goes up spine
-muscles that go up back
-Origin - sacrum
-insertion – vertebrae
Extension of back and all other movements
External oblique
-anchored by ribs
– Goes down towards center
– Action – twist and flex/crunch
(sides)
Internal oblique
– Slightly deeper
– Anchored on hip
Action – twist and flex/crunch
Transversus abdominus
– Deeper
– Compresses abs
– Flexes abs
– Anchored at sides
rectus abdominis
– Six pack muscle
action – crunch/set up
Trapezius
– Covers most upper back
– Shrug shoulders – shoulders go back
– Extension of neck/back – head goes back
Rhomboideus
– Upper back – between scapula
– Bring scapula together
serratus anterior
under armpit
Origin is on side
Brings shoulders forward
Pectoralis minor
– Anchored at ribs – front – attaches to scapula
– Top of shoulder
– Brings shoulder forward and down
Pectoralis major
– Covers hold chest
– Anchors at sternum – inserts at humorous
– Hug -brings arms across
Teres major
– Scapula is anchor – bottom – to humorous
– Adduction of arms
Latissimus dorsi
- lower back
- adduction - iron cross
supraspinatus
– Sits a top scapula – to top of humorous
– Holding humorous in socket
Deltoid
– Cover shoulder
– Abduction of arms
– lifts up arms
