muscle orgins and actions Flashcards
what is the action of the masseter
the major muscle that elevates the mandible
what is the attachment point of the masseter
the zygomatic bone/ arch
what is the action of the temporalis
elevate the mandible
what is the attachment point of the temporalis
the temporal fossa
what is the action of the frontalis
raise eyebrows an wrinkle forehead
what is the attachment point of the frontalis
the frontal bone, epicardial aponeurosis
what is the action of the orbicularis oculi
blink, squint, close your eyes
what is the attachment point of the orbicularis oculi
tissue around the eyes
what is the action of the orbicularis oris
pucker lips, kissing muscle
what is the attachment point if the orbicularis oris
tissue around the mouth
what is the action of the sternocleidomastoid
when using 1 muscle: ipsilateal contraction and rotation (contract left: left flexion, right rotation)
whn using 2 muscles: neck flexion (looking down)
what is the attachment point of the sternocleidomastoid
insertion is the mastoid process of the temporal bone
what is the action of the pectoralis major
adduction of the arm
what is the attachment point of the pectoralis major
intertubercular socius (groove)
what is the action of the rectus abdominis
flex the trunk
what is the attachmnet point of the rectus abdominis
pubic symphysis of the xiphoid process
what is the action of the external oblique
unilateral conraction: lipsilateral flextion or rotation
contraction of both: flexion of the trunk
what is the attachment point of the external oblique
the ribs
what is the action of the trapezuis
shrugging your shoulders, neck extension
what is the attachment point of the trapezius
the spine of the scapula
what is the action of the latissimus dorsi
arm extension at shoulder joint (push arm back)
what is the attachment point of the latissimus dorsi
posterior muscle attached to intertubercular socius (groove)
what is the action of the deltoid
main arm abduction (pshing arm out to the side)
what is the attachment point of the deltoid
deltoid tuberosity of diaphysis of humerus
what is the action of the erector spinae
straighten the back
what is the attachment point of the erector spinae
transverse process of vertebrae
what is the action of the biceps brachii
flex the arm at elbow joint
what is the attachmnet point of biceps brachii
radial tuberosity
what is the action of the triceps brachii
extends the arm at the elbow
what is the insertion of the triceps brachii
olecranon fossa
what is the action of the pronator teres
pronate the arms (palms face forward/ down)
what is the attachment point of the pronator teres
origin on medial side and insertion on lateral side
what is the action of the supinator
supinate the arms (palms facing down/ back)
what is the attchment point of the supinator
origin on lateral side and insertion on medial side
what is the action of the gluteus maximus
extension of the leg at the hip
what is the attachment point of the gleuteus maximus
gluteal tuberosity on proximal end of femur
what is the action of the hamstring muscles
extend the leg at hip and cause flexion of knee bone
what is the attachment point of the hamstring muscles
ischial tuberosity of ischium
what is the action of the adductor muscles
adduct the leg (bring it towards middle)
what is the attachment point of the adductor muscles
Linea aspera
what is the action of the sartorius
allows you to sit with legs crossed
what is the attachmnet point of the sartorius
anterior supirior iliac spine
what is the action of the quadriceps femoris
flex leg at him and extend leg atknee (kick forward)
what is the attachment point of the quadriceps femoris
tendon that lays over the patella
what is the action of the gastrocnemius
plantar flexion (stand on tippy toes)
what is the attachment point of the gastrocnemius
achelous tendoes attaced to calcaneus
what is the action of the tibialis anterior
pull toes up
what is the attachment point of the tibialis anterior
tarsal and metatarsal bones
