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Cloned from: Anatomy Muscles



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Front Back
Masseter
Muscles of mastication
O: zygomatic arch
I: Mandibular angle and mandibular ramus
A: elevates mandible
Temporalis
Muscles of mastication
O: Temporal fossa
I: coronoid process of the mandible
A: elevates mandible and retracts mandible
Sternocleidomastoid
Muscles of the neck
O: Manubrium, medial clavicle
I: Mastoid process
A: Flexes and rotates the head
Scalenes: Anterior, Middle, Posterior
Muscles of the neck
O: transverse processes of the cervical membrane
I: Anterior surface of ribs 1-2
A: Elevates ribs1-2, flexes neck, rotates neck
Pectoralis Major 
Muscles of Anterior Thoracic Wall
O: Sternal end of the clavicle, sternum, ribs 1-6
I: Lateral intertubercular groove of humerus
A: Flexes arm at shoulder, rotates arm medially, adducts arm.
Pectoralis Minor
Muscles of Anterior Thoracic Wall
O: Ribs 3-5
I: Coracoid process of the scapula
A: Depresses scapula, rotates scapula downwards
Serratus Anterior
Muscles of Anterior Thoracic Wall
O: Ribs 1-8
I: Vertebral border of the scapula
A: Rotates scapula upwards, protracts scapula
External Intercostals
Muscles of Anterior Thoracic Wall
O: Inferior Border of ribs
I: Superior border of ribs
A: elevates rib cage
Internal Intercostals
Muscles of Anterior Thoracic Wall
O: Superior border of ribs
I: Inferior border of ribs
A: Depresses rib cage
External Oblique
Muscles of Anterior and Lateral Abdomen Wall
O: Ribs 5-12
I: Linea alba, pubic crest, pubic tubercle, iliac crest
A: Flexes and rotates vertebral column, compresses abdomen.
Internal Oblique 
Muscles of Anterior and Lateral Abdomen wall
O: Lumbar fascia, iliac crest, inguinal ligament.
I: Linea alba, pubic crest, ribs 9-12.
A: Flexes and rotates vertebral column, compresses abdomen.
Rectus Abdominis
Muscles of the Anterior  and Lateral abdomen wall
O: pubic crest, pubic symphysis
I: Xiphoid process, ribs 5-7
A: Flexes and rotates vertebral column, compresses abdomen.
Deltoid
Anterior Arm
O: lateral 1/3 of clavicle, spine of scapula, acromion process of scapula
I: Deltoid Tuberosity
A: Abducts arm, flexes arm at shoulder, rotates arm medially, extends arm at shoulder, rotates arm laterally.
Biceps brachii: Long head and Short Head
Anterior Arm
O: Long head: Supraglenoid tubercle 
Short head: coracoid process
I: Long head: radial tuberosity
Short head: radial tuberosity
A: Long head: flexes forearm at elbow, supinates forearm.
Short arm: flexes forearm at elbow, supinates forearm.

Brachialis
Anterior Arm
O: Anterior humerus
I: Coronoid process of the ulna
A: Flexes forearm at elbow
Coracobrachialis
Anterior Arm
O: coracoid process
I: medial surface of shaft of humerus
A: flexes arm at shoulder, adducts arm
Brachioradialis
Posterior Forearm
O: Lateral supracondylar ridge of the humerus
I: Styloid process of the radius
A: Flexes forearm at elbow, stabalizes elbow during flexion and extension.
Extensor Carpi Radialis Longus
Posterior Forearm
O: Lateral supracondylar ridge of the humerus
I: 2nd Metacarpal
A: Extends hand at wrist, abducts hand
Extensor Carpi radialis brevis
Posterior Forearm
O: lateral epicondyle of the humerus
I: 3rd metacarpal
A: Extends hand at wrist, abducts hand.
Extensor Digiitorum
Posterior Forearm
O: Lateral epicondyle of the Humerus
I: Distal phalanges of 2nd to 5th digit
A: Extends distal interphalangeal joints, extends hand at wrist.
Extensor carpi Ulnaris
Posterior Forearm
O: Lateral epicondyle of the Humerus, proximal ulna.
I: 5th Metacarpal
A: Extends hand at wrist, adducts hand.
Supinator
Posterior Forearm
O: lateral epicondyle of the humerus, proximal ulna
I: proximal end of Radius
A: Supinates forearm
Abductor Pollicis Longus
Posterior Forearm
O: Posterior Radius, Posterior Ulna, Interosseous membrane.
I: Trapezium, 1st Metacarpal
A: Abducts pollex
Extensor Pollicis brevis
Posterior Forearm
O: Posterior radius, posterior ulna, interosseous membrance
I: Proximal phalanx of pollex
A: Extends 1st metacarpal-phalangeal joint
Extensor pollicis Longus
Posterior Forearm
O: Posterior radius, posterior ulna, interosseous membrane
I: Distal phalanx pollex
A: Extends 1st interphalangeal joint
Extensor Indicis
Posterior Forearm
O: posterior Ulna, interosseous membrane
I: Distal phalanx of 2nd digit
A: Extends 2nd distal interphalangeal joint
Extensor Digiti Minimi Posterior Forearm  
O: Lateral epicondyle of the humerus
I: Distal phalanx of 5th digit
A: Extends 5th distal interphalangeal joint.
Sartorius
Anterior Thigh
O: Anterior Superior Iliac spine
I: Medial surface of proximal tibia
A: Flexes thigh at hip, rotates thigh laterally, abducts thigh, flexes leg at knee.
Tensor Fascia Latae
Anterior Thigh
O: Anterior superior iliac spine, iliac crest
I: Iliotibial tract
A: Flexes thigh at hip, abducts thigh, rotates thigh medially.
Iliopsoas 
Anterior Thigh
O: iliac fossa, ala of the sacrum, transverse processes of T12-L5
I: lesser trochanter
A:Flexes thigh at hip, flexes vertebral column.
Pectineus
Anterior thigh
O: Superior ramus of the pubis
I: linea aspera
A: Adducts thigh, flexes thigh at hip, rotates thigh medially
Quadriceps Femoris (4)
Anterior Thigh

Rectus Femoris:
O: Anterior Inferior Iliac spine
I: Patella and tibial tuberosity via tendon of quadriceps femoris and patellar ligament. 
A: Extends leg at knee, flexes thigh at hip.   Vastus Lateralis:
O: Greater trochanter, intertrochanteric line, linea aspera
I: same
A: Extends leg at knee, stabilizes knee Vastus Medialis:
O: Linea aspera, interochanteric line
I: same
A: Extends leg at knee, stabalizes patella Vastus Intermedius:
O: Proximal shaft of femur
I: Same
A: Extends leg at knee
Gracilis
Medial Thigh
O: inferior ramus of the pubis, body of pubis
I: medial surface of the tibia
A: adducts thigh, flexes leg at knee, rotates leg medially
Adductor Longus
Medial Thigh
O: Pubis, near the pubis symphysis
I: linea aspera of the femur
A: Adducts thigh, flexes thigh at hip, rotates thigh medially
Adductor Brevis
Medial Thigh
O: body of pubis, inferior ramus of the pubis
I: Linea aspera, adductor tubercle
A:Adducts thigh rotates thigh medially
Adductor magnus
Medial thigh
O: Inferior ramus of the pubis, ischial ramus, ischial tuberosity.
I: Linea aspera, adductor tubercle
A: Adducts thigh, rotates thigh medially, flexes thigh at hip
Tibialis Anterior 
Anterior Leg
O: Lateral condyle of the tibia, interosseous membrane.
I: Medial cuneiform, 1st metatarsal.
A: Dorsiflexes foot at ankle, inverts foot.
Extensor hallucis longus
Anterior Leg
O: Proximal shaft of the fibula, interosseous membrane
I: Distal phalanx of the great toe
A: Dorsiflexes foot at ankle, extends great toe.
Extensor Digitorum longus
Anterior Leg
O: Lateral condyle of the tibia, proximal fibula, interosseous membrane
I: Middle and distal ohalanges of 2nd- 5th digits
A: Extends 2nd-5th distal interphalangeal joints
Fibularis tertius
Anterior Leg
O: Distal shaft of fibula, interosseous membrane
I: 5th Metatarsal
A: Dorsiflexes foot at ankle, everts foot.
Fibularis longus
Lateral leg
O: Head of the fibula 
I: Medial cuneiform, 1st metatarsal
A: plantar flexes foot at ankle, everts foot.
Fibularis Brevis
Lateral leg
O: Distal shaft of fibula
I: 5th metatarsal
A: Plantar flexes foot at ankle, everts foot.
Trapezius
Posterior Thoracic Wall
O: occipital bone, spinous processes of C7-T12
I: Lateral 1/3 of clavicle, spine of scapula, acromion process
A: Elevates scapula, depresses scapula, rotates scapula, adducts scapula.
Latissimus Dorsi
Posterior Thoracic Wall
O: Spinous processes of T7-T12, ribs, 9-12, iliac crest.
I: intertubercular groove
A: Extends arm at shoulder, adducts arm, rotates arm medially
Levator Scapula
Posterior Thoracic Wall
O: Transverse processes of C1-C4
I: Vertebral border of the Scapula
A: Elevates scapula, downwardly rotates scapula
Rhomboid Major
Posterior Thoracic Wall
O: Spinous processes of T2-T5
I: Vertebral border of the scapula
A: adducts scapula, downwardly rotates scapula
Rhomboid Minor
Posterior Thoracic Wall
O: Spinous Processes of C7-T1
I: Vertebral border of the scapula
A: Adducts scapula, downwardly rotates scapula
Supraspinatus 
Scapula
O: Supraspinous fossa
I: Greater tubercle
A: abducts arm
Infraspinatus
Scapula
O: infraspinous fossa
I: greater tubercle
A: rotates arm laterally
Teres Major
Scapula
O: Inferior angle of the scapula
I: lesser tubercle
A: Adducts arm, extends arm at shoulder, rotates arm medially
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