ANTERIOR MUSCLES (ORIGIN, INSERTION ACTION)

Important to know where these are located first

Anterior tibialis

Origin: Lateral surface of tibia, interosseous membrane

Insertion: medial cuneiform bone, base of metatarsal bone 1

Soleus

Origin: medial border of tibia, head of fibia, posteior border of fibula

Insertion: posterior surface of calcaneus (via calcaneal tendon)

Biceps brachii

Origin: coracoid process of scapula (short head), supraglenoid tubercle of the scapula (long head)

Insertion: radial tuberosity of the radius, deep fascia of forearmthe

Brachialis

Origin: distal half of the anterior of the humerus

Insertion: coronoid process of the ulna. tuberosity of ulna

Brachioradialis

Origins: lateral supracondylar ridge of humerus

Insertion: styloid process of radius

Pronator teres

Origin: medial supracondylar ridge of humerus, cornoid process of ulna

insertion: lateral surface of radius

Pronator quadratus

Origins: distal anterior surface of radius

Insertion: distal anterior surface of radius

Psoas major and minor

Origins: vertebral bodies of T12-L4, intervertebral discs between T12-L4, transverse processes of L1-L5 vertebrae

Insertion: lesser trochanter of the femur as the iliopsoas tendon

Pectineus

Origins: superior pubic ramus

Insertions: pectineal line of femur, linea aspera of femur

Quadratus femoris

Origin: ischial tuberosity

Insertion: Intertrochanteric crest of femur

Rectus fem

Origin: Anterior Inferior iliac spine (AIIS), acetabulum

Insertion: patella and tibial tuberosity

Vastus lat, intermed, med

Origin: Intertrochanteric line, pectineal line of femur, linea aspera, medial supracondylar line of femur

insertion: tibial tuberosity (patellar ligament), patella (medial condyle of tibia)

Sartorius

Origin: anterior superior iliac spine (ASIS)

Insertion: proximal end of tibia below medial condyle (pes anserinus) Pec minor

Pec minor

origin: anterior surface, costal cartilages of ribs. 3-5

insertion: medial border and coracoid process of scapula

Serratus anterior

origin: ribs

• superior part: ribs 1-2, intercostal fascia

• middle part: ribs 3-6

• inferior part: ribs 7-9

insertion: scapula

• superior part: anterior surface fo superior angle

• middle part: anterior surface of medial border

• inferior part: anterior surface of inferior angle and medial border

Pec major

Origin:

• clavicular part: anterior surface of medial half of clavicle

• Sternocostal part: anterior surface of sternum, costal cartilages of ribs 1-6

• abdominal part: anterior layer of rectus sheath

insertion: lateral lip of intertubercular sulcus of humerus

Coracobrachialis

Origin: coracoid process of scapula

insertion: anteromedial surface of the humerual shaft

Deltoid

Origins: Clacicle, Acromion, Spine of scapula (“deltiods help you carry SACS” )

Insertion: deltiod tuberosity of humerus

Rectus abdominus

Origin: pubic symphysis, pubic crest

Insertion: xiphoid process, costal cartilages of ribs 5-7

Transverse abd

Origins: internal surface of costal cartilages of ribs 7-12, thoracolumbar fascia, anterior two thirds of iliac crest, iliopectineal arch

insertion: linea alba, aponeurosis of internal abdominal oblique muscle, pubic crest, pectinal line of pubis

SCM (Sternocleidomastoid)

Origins:

• sternal head: superior part of anterior surface of manubrium sterni

• clavicular head: superior surface of medial third of the clavicle

insertions: CN XI, branches of cervical plexus (C2-C3)

Peroneus tertius

Origin: medial surface of fibula, interosseous membrane, anterior intermuscular septum

insertion: dorsal surface of base of metatarsal bone 5

Peroneus longus

Origin: head of fibula, proximal 2/3 of lateral surface of fibula, intermuscular septa

Insertion: medial cuneiform bone, metatarsal bone 1

Peroneus brevis

Origin: distal 2/3 of the lateral surface of fibula, anterior inermuscular septum

insertion: tuberosity of the 5th metatarsal bone