Muscle Anatomy Flashcards
Muscle that closes eyes, squint, lowers eyebrows
orbicularis oris
closes lips (purses, protrudes)
orbicularis oris
Raises corners of mouth
Zygomaticus major
Compress cheeks (whistling, sucking)
Buccinator
Raise eyebrows
Frontalis
Elevates mandible (as in closing mouth while chewing)
masseter
elevates mandible
temporalis
pulls lower lip down (as in frowning) depresses mandible
platysma
Both sides; flexes neck (as in looking down) one side: cocks head
sternocleidomastoid
What is the orgin and insertion of the sternocleidomastoid?
Origin: sternum, clavicle
Insertion: mastoid process
Both sides: extends neck (as in looking up) one side: cocks head
splenius capitis
Pulls ribs up toward origin, elevates ribcage to cause inspiration
external intercostals
drops down to enlarge thoracic cavity, causing inspiration
diaphragm
compress abdominal contents
transverse abdominus
compress abdomen, flexes vertebral column
rectus abdominis
What are the origin and insertion of the rectus abdominis
origin: puic symphysis
Insertion: xiphoid process
sit-up with a twist
obliques
Shoulder flexion
deltoid (anterior)
shoulder abduction
deltoid (middle)
Shoulder extension
deltoid (posterior)
What is the origin and insertion of the deltoids?
Deltoid A - clavicle/ deltoid tuberosity of humerus
Deltoid M- acromion
Deltoid P - Scapular spine
Flexion, adduction, medial rotation of humerus at shoulder (fist raise, bench press)
Pectoralis major
What is the orgin and insertion of the pectoralis major
sternum
humerous head
extention, adduction, medially rotation humerus at shoulder (lat pulls)
latissimus dorsi
What is the origin and insertion of the latissimus dorsi?
inferior half of vertebral column and iliac crest
humerous head
Flexes elbow (as in bringing a spoon to your much)
brachialis
pronates forearm to elbow (turning a doorknob)
pronator teres
flexes elbow, supinates forearm (as in scooping up water)
biceps brachii
what is the origin and insertion of the biceps brachii?
long head: supraglenoid tubercle of scapula
short head: coracoid process of scapula
radial tuberosity
extends forearm at elbow (as in lowering a spoon back to the table
triceps brachii
what are the orgin and insertion of the triceps brachii?
long head: infraglenoid tubercle of scapula
lateral head: posterior proximal shaft of humerous
medial head: posterior distal shaft of humerus
/ olecranon of ulna
elbow flexion and supination
brachioradialis
supination
supinator
wrist extension
extensor carpiradialis
wrist flexion
flexor carpi radialis/ ulnaris (depends on direction)
wrist extension
extensor carpiulnaris
extends digits of hand and wrist
extensor digitorum
flexes digit of hand and wrist
flexor digitorum
Flexes hip, adducts leg
pectineus
flexes hup, adducts leg
adductur longus
extends hip adducts leg
adductur magnus
extends hip, roates leg laterally ( pushing down while climbing a stair)
gluteus maximus
what is the origin and insertion of gluteus maximus?
origin: illium, sacrum, coccyx
insertion: proximal femur
adducts leg at hip, flexes knee
gracilis
abducts leg at hip
tensor fasciae latae
flexes hip, lifting leg to place on stair
iliopsoas
flexes hip and flexes knee, laterally rotates thigh (into cross legged position)
sartorius
hip abduction
gluteus medius and minimus
hip rotation
piriformis
extends hip, flexes knee, laterally rotates leg
biceps femoris
What is the origin and insertion of biceps femoris?
ischial tuberosity
proximal fibula
extends hip, flexes knee
semimmembranosus/semitendinosus
what is the origin and insertion of the semimembranosus/semitendinosus?
ischial tuberosity
proximial tibia
Extends knee
Vastus lateralis, intermedius, medialis
what is the origin and insertion of the vastus muscle?
proximal femur
tibial tuberosity and platella
extends knee, flexes hip(kicking a ball)
rectus femoris
what is the origin and insertion of the rectus femoris?
ASIS (crosses over hip joint)
tibial tuberosity of platella
planter flexion at ankle
soleus
what is the origin and insertion of the soleus?
proximial tibia and fibula
calcaneus
planter flexion at ankle, flexes knee
gastrocnemius
What is the insertion and orgin of the gastrocnemius?
distal femur
calcaneus
dorsiflexion and inversion at ankle
tibialis anterior
what is the origin and insertion of the tibialis anterior?
proximal tibia
metatarsal 1