muscles

pulls scapula forward

trunk rotation

assisst with trunk flexion and respiration- synergist

wall of abdomen, applys pressure to abdominal organs

boxer's muscle, brings scapula forward

abduct humerus

neck extension, posture, elevate scapula

adducts arm

retracts scapula, synergist

retracts scapula, prime mover

chewing, closing jaw

fixator to anterior neck muscles

chewing, elevates jaw

raise eyebrows

smiling, prime mover

kissing muscle, pulls cheeks inward, chewing

help flex forearm

dorsiflexion

trunk flexion

elevates spine- synergist

rotate humerus

blinking, moves eyelids

flexes forearm

helps with forearm with flexion- fixator

rotates head, two sides are antagonists to each other

pucker lips, synergist

anterior forearm, flexes fingers and wrists, prime movers

flexion of wrist, vestigial

adduct arms, antagonist to deltoid

most medial quadricep, extends knee and lower leg

central quadricep, extends knee and lower leg

most lateral quadricep, extends knee and lower leg

deep quadricep, extends knee and lower leg

laterally rotates thigh

medially rotates thigh, synergist

extends forearm

deep group of muscles that maintain posture

posterior side of forearm that extend wrist and fingers

extends thigh

flexes lower leg, walking, plantar flexion

flexes lower leg, standing, plantar flexion

calcaneus

medially rotates thigh, synergist

flex knee

fascicles arranged on either side of a tendon, can have 2 origins, strong contractions ex: rectus femoris, gastronemius, serratus anterior

multiple tendons surrounded by fascicles meeting at a certain point, multiple tendons and angled fascicles ex: deltoid, pectoralis minor, gluteus minimus

concentrically arranged fibers, insertions not involved with bone ex: obicularis oculi and obicularis oris

fascicles arranged in same directions, most skeletal muscles, some flat, sheet-like, often called rectus ex: rectus abddominis, sartorius, gracilis, brachialis

type of parallel muscles, has a belly, tapers to tendon, multiple origins, 1 insertion ex: biceps brachii, triceps brachii, hamstrings

fascicles arranged on one side of a tendon, feather-like, can only pull at a certain angle ex: serratus anterior

wide origin, narrow insertion point, most large muscles that start on multiple bones then attach to a bone in one location ex: pectoralis major, trapeziusm latissimus dorsi, gluteus maximus

attaches muscle to bone

surrounds entire muscle

bundles of muscle fibers or muscle cells

composed of fascicles

bundles of myofibrils

Connective tissue surrounding a fascicle

Connective tissue surrounding a muscle fiber

bundles of myofilaments

composed of thin actin and thick myosin

combine to form sarcomere