muscles vs actions

smiling

zygomaticus major and orbicularis oris

neck flexion

sternocleidomastoid

flex vertebral column and compress abdomen

rectus abdominis

closes eyelids

orbicularis oculi

arm adduction, shoulder extention

latissimus dorsi

arm adduction, shoulder flexion

pectoralis major

arm abduction

deltoid

flexes elbow joint and supinates forearm

biceps brachii

elbow extension

triceps brachii

elevates scapula, shoulder shrug and can tense up during anxiety

trapezius

group name of 4 muscles and extend knee

quadriceps femoris

extension of thigh

gluteus maximus

abduction, medial rotation of thigh

gluteus medius

group of muscles: knee flexion and PM of thigh extension

hamstrings

PM dorsiflexion and inversion of foot

tibialis anterior

plantar flexion of foot

gastrocnemius