Origin, Insertion, Action of muscles and Compartments

Zygomaticus minor and major origin

zygomatic bone

Zygomaticus minor and major insertion

skin and muscle at corner of mouth

Zygomaticus minor and major action

elevates lateral corners of the mouth to smile

Masseter origin

zygomatic arch and zygomatic bone

Masseter insertion

angle and ramus of mandible

Masseter action

elevates mandible

Sternocleidomastoid origin

manubrium and medial part of clavicle

Sternocleidomastoid insertion

mastoid process

Sternocleidomastoid action

Flexes and laterally rotates the head

Rectus abdominis origin

pubic crest and symphysis

Rectus abdominis insertion

xiphoid process and costal cartilages of ribs 5-7

Rectus abdominis action

flexes and rotates lumbar reigon vertebral column

Pectoralis minor origin

anterior surface of ribs 3-5 or (2-4)

Pectoralis minor insertion

coracoid process of scapula

Pectoralis minor action

protracts and depresses scapula

Deltoid origin

llateral third clavicle acromion and spine of scapula

Deltoid insertion

deltoid tuberosity of humerus

Deltoid action

abduction of arm

Subscapularis origin

subscapular fossa

Subscapularis insertion

lesser tubercle of humerus

Subscapularis action

rotates arm medially

Supraspinatus origin

supraspinous fossa

Supraspinatus insertion

superior part of the greater tubercle of humerus

Supraspinatus action

stabilizes shoulder and initiates abduction of arm

Infraspinatus origin

infraspinous fossa

Infraspinatus insertion

greater tubercle of humerus

Infraspinatus action

lateral rotation of humerus posterior to insertion of supraspinatus

Biceps brachii short head origin

coracoid process

Biceps brachii long head origin

supraglenoid tubercle and upper lip of glenoid cavity

Biceps brachii insertion

radial tuberosity

Biceps brachii action

flexes elbow and supinates forearm

Sartorius origin

anterior superior iliac spine

Sartorius insertion

medial proximal tibia

Sartorius action

flexes, abducts, and laterally rotates thigh

Rectus femoris origin

anterior inferior iliac spine

Rectus femoris insertion

tibial tuberosity and patella via patellar ligament

Rectus femoris action

extends leg and flexes hip at thigh

Gluteus maximus origin

iliumm, sacrum, and coccyx

Gluteus maximus insertion

gluteal tuberosity of femur

Gluteus maximus action

extends and laterally rotates thigh

Gastrocnemius origin

medial and lateral condyles of femur

Gastrocnemius insertion

calcaneus via calcaneal tendon

Gastrocnemius action

plantar flexes foot

Soleus origin

proximal tibia and fibula

Soleus insertion

calcaneus via calcaneal tendon

Soleus action

plantar flexion

Anterior compartment of arm action

flexion at shoulder and elbow joint

Anterior compartment of arm muscles

Biceps brachii

Posterior compartment of arm action

extends forearm at elbow joint

Posterior compartment of arm muscles

triceps brachii

Anterior compartment of forearm action

flexion of wrist and digits

Anterior compartment of forearm muscles

Flexor carpi radialis Palmaris longus Flexor carpi ulnaris and Flexor digitorum superficialis

Posterior compartment of forearm action

extension of wrist and digits

Posterior compartment of forearm muscles

Extensor digitorum Extensor carpi ulnaris and Brachioradialis

Anterior compartment of thigh action

Flexion at the hip joint, extension at the knee joint

Anterior compartment of thigh muscles

Rectus femoris Vastus lateralis Vastus medialis Vastus intermedius Sartorius Iliacus Psoas major and Tensor fascia lata

Medial compartment of thigh action

adduction and medial rotation of thigh

Medial compartment of thigh muscles

Adductor longus Adductor magnus Pectineus and Gracilis

Posterior compartment of thigh action

Extension at the hip joint, flexion at the knee joint

Posterior compartment of thigh muscles

Gluteus maximus Biceps femoris Semitendinosus and Semimembranosus

Anterior compartment of leg action

dorsiflexion and inversion of the foot

Anterior compartment of leg muscles

Tibialis anterior

Lateral compartment of leg action

Plantar flexion and eversion of foot

Lateral compartment of leg muscles

Fibularis longus

Posterior compartment of leg action

plantar flexion of foot

Posterior compartment of leg muscles

Gastrocnemius Soleus and Calcaneal tendon