20 Muscles Origins and Insertions

Origin of Temporalis?

Temporal fossa

Insertion of Temporalis?

Coronoid process of mandible

Origin of Sternocleidomastoid?

Manubrium

Insertion of Sternocleidomastoid?

Mastoid process

Origin of Rectus Abdominis?

Pubic crest

Insertion of Rectus Abdominis?

Xiphoid process

Origin of Iliopsoas?

Iliacus: inner surface of ilium

Psoas major/minor: lateral/inferior sacrum

Insertion of Iliopsoas?

Iliacus/Psoas Major: lesser trochanter of femur

Psoas Minor: pectineal line (ilium)

Origin of Pectoralis Major?

anterior surface of sternum

Insertion of Pectoralis Major?

Lateral margin of intertubercular groove of humerus

Origin of Latissimus Dorsi?

Inferior angle of scapula

Insertion of Latissimus Dorsi?

Intertubercular groove of humerus

Origin of Deltoid?

spine of scapula

Insertion of Deltoid?

Deltoid tuberosity of humerus

Origin of Biceps Brachii?

Short head: coracoid process of scapula

Long head: supraglenoid tubercle of scapula

Insertion of Biceps Brachii?

Radial tuberosity of radius

Origin of Triceps Brachii?

Long head: infraglenoid tubercle of scapula

Medial head: posterior surface of humerus

Lateral head: posterior surface of humerus

Insertion of Triceps Brachii?

Olecranon process of ulna

Origin of Extensor Digitorum?

Lateral epicondyle of humerus

Insertion of Extensor Digitorum?

Middle and distal phalanges of fingers 2-5

Origin of Flexor Digitorum Superficialis?

Coronoid process of ulna

Insertion of Flexor Digitorum Superficialis?

Medial phalanges of fingers 2-5

Origin of Gluteus Maximus?

posterior surface of sacrum and coccyx

Insertion of Gluteus Maximus?

gluteal tuberosity of femur

Origin of Rectus Femoris?

Anterior inferior iliac spine

Insertion of Rectus Femoris?

Superior aspect of patella

Origin of Biceps Femoris?

Long head: Ischial tuberosity

Short head: lower ½ linea aspera of femur

Insertion of Biceps Femoris?

Head of fibula

Origin of Gastrocnemius?

Medial head: posterior surface of the medial femoral condyle

Lateral head: posterior surface of lateral femoral condyle

Insertion of Gastrocnemius?

Posterior surface of calcaneus via calcaneal tendon

Origin of Tibialis Anterior?

Upper 2/3 of the lateral surface of tibia

Insertion of Tibialis Anterior?

1st metatarsal bone

Muscle?

Tibialis anterior

Muscle?

Gastronemius

Muscle?

Bicep femoris

Muscle?

Rectus femoris

Muscle?

Flexor digitorum superficialis

Muscle?

Extensor digitorum

Muscle?

Tricep brachii

Muscle?

Bicep brachii

Muscle?

Deltoid

Muscle?

Latissimus dorsi

Muscle?

Pectoralis Major

Muscle?

Illiopsoas

Muscle?

Rectus abdominis

Muscle?

Sterncleidomastoid

Muscle?

Temporalis

Actions of Iliopsoas?

flexes hip

Actions of Gluteus Maximus?

extension and external rotation of hip

Actions of Rectus Femoris?

Extension of knee

Actions of Biceps Femoris?

Flexion of knee

Actions of Gastrocnemius?

Plantar flexion of ankle

Actions of Tibialis Anterior?

Dorsiflexion of knee

Origin of Supraspinatus?

Medial 2/3 of supraspinatus fossa of scapula

Insertion of Supraspinatus?

Superiorly on greater tubercle of humerus

Origin of Infraspinatus?

Medial aspect of infraspinatus fossa of scapula

Insertion of Infraspinatus?

Posteriorly on greater tubercle of humerus

Origin of Teres Minor?

Posteriorly on upper and middle aspects of lateral bordar of scapula

Insertion of Teres Minor?

Posteriorly on greater tubercle of humerus

Origin of Subscapularis?

Entire anterior surface of subscapular fossa of scapula

Insertion of Subscapularis?

Lesser tubercle of humerus

Actions of Supraspinatus?

Stabilizes GHJ

Actions of Infraspinatus?

extension of GHJ

Actions of Teres Minor?

extension of GHJ

Actions of Subscapularis?

extention of GHJ

Muscle?

Supraspinatus

Muscle?

Infraspinatus

Muscle?

Teres Minor

Muscle?

Subscapularis

Actions of Temporalis?

Elevates mandible

Actions of Sternocleidomastoid?

rotates neck

Actions of Deltoid?

arm flexion and extension

Actions of Pectoralis Major?

arm flexion

Actions of Latissimus Dorsi?

arm extension

Actions of Rectus Abdominis?

trunk flexion

Actions of Biceps Brachii?

Forearm flexion

Actions of Triceps Brachii?

Forearm extension

Actions of Extensor Digitorum?

Extension of fingers 2-5

Actions of Flexor Digitorum Superficialis?

Flexion of fingers 2-5