BioSci202 Top 20 Muscles (Specifics split up)

temporalis

.

sternocleidomastoid

.

rectus abdominis

.

iliopsas

.

pectoralis major

.

latissimus dorsi

.

deltoid

.

biceps brachii

.

triceps brachii

.

extensor digitorum

.

flexor digitorum superficialis

.

gluteus maximus

.

rectus femoris

.

biceps femoris

.

Gastrocnemius

.

tibialis anterior

.

supraspinatus

.

infraspinatus

.

teres minor

.

subscapularis

.

temporalis action

Action: elevates mandible

temporalis insertion

insertion: coronoid process of mandible and mandibular ramus

temporalis origin

origin: temporal fossa

Sternocleidomastoid action

action: laterally flexes head and neck

sternocleidomastoid insertion

insertion: mastoid process

sternocleidomastoid origin

origin: manubrium and clavicle

rectus abdominis action

action: flexes lumbar spine; compresses abdomen

rectus abdominis origin

Origin: pubic crest and symphysis

rectus abdominis insertion

insertion: xiphoid process and inferior ribs (5-7)

iliopsas action

action: flexion of the hip; external rotation of femur

iliopsas origin

origin: inner surface of ilium

iliopsas insertion

insertion: femur and ilium

pectoralis major action

action: adducts, flexes, rotates arm

pectoralis major origin

origin: clavicle, ribs 1-6, sternum

pectoralis major insertion

insertion: greater tubercle of the humerus

latissimus dorsi action

action: adducts, abducts, rotates arm

latissimus dorsi origin

origin: ilium, spinous process of T7-S3, ribs 10-12

latissimus dorsi insertion

insertion: intertubercular groove (medial side) of humerus

deltoid action

action: adducts, flexes, abducts, extension, lateral rotation at shoulder

deltoid origin

origin: clavicle, acromion process, scapular spine

deltoid insertion

insertion: deltoid tuberosity of humerus

biceps brachii action

action: flexes elbow, supinates hand

biceps brachii origin

origin: glenoid fossa, coracoid process of scapula

biceps brachii insertion

insertion: radial tuberosity of radius

triceps brachii action

action: extends elbow, adducts and extends glenohumeral joint

triceps brachii origin

origin: scapula, humerus

triceps brachii insertion

insertion: olecranon process of ulna

extensor digitorum action

action: extends digits 2-5

extensor digitorum origin

origin: epicondyle of humerus

extensor digitorum insertion

insertion: phalanges

flexor digitorum superficialis action

action: flexes digits

flexor digitorum superficialis origin

origin: Medial epicondyle of humerus and coronoid process of ulna

flexor digitorum superficialis insertion

insertion: phalanges of fingers 2-5

gluteus maximus action

action: extension, external rotation, adduction of hip

gluteus maximus insertion

insertion: femur

gluteus maximus origin

origin: iliac crest, sacrum, coccyx

rectus femoris action

action: extension of the knee and flexion of the hip

rectus femoris origin

origin: iliac spine, acetabulum

rectus femoris insertion

insertion: patella, tibial tuberosity

biceps femoris action

action: flexion of knee, extension of hip, external rotation of hip and knee

biceps femoris origin

origin: ischial tuberosity, linea aspera

biceps femoris insertion

insertion: Lateral condyle of tibia and head of fibula

gastrocnemius action

action: flexion of ankle

Gastrocnemius origin

origin: femoral condyle

Gastrocnemius insertion

insertion: calcaneus

tibialis anterior action

action: dorsiflexion of the ankle and inversion of the foot

tibialis anterior insertion

insertion: cuneiform and first metatarsal

tibialis anterior origin

origin: tibia

supraspinatus action

action: stabilizes glenohumeral joint and abduction GHJ

supraspinatus insertion

insertion: Superiorly on the greater tubercle of the humerus

supraspinatus origin

origin: supraspinous fossa of the scapula

infraspinatus action

action: stabilizes GHJ, external rotation, horizontal abduction and extension of the GHJ

infraspinatus origin

origin: infraspinous fossa of the scapula

infraspinatus insertion

insertion: Posteriorly on the greater tubercle of the humerus

teres minor action

action: stabilizes GHJ, external rotation, horizontal abduction, extension of GHJ

teres minor origin

origin: lateral border of the scapula

teres minor insertion

insertion: greater tubercle of the humerus

subscapularis action

action: stabilizes GHJ, internal rotation, adduction, and extension of the GHJ

subscapularis origin

origin: anterior surface of subscapular fossa

subscapularis insertion

insertion: lesser tubercle of humerus