O: Clavicular head --> anterior surface of the medial half of the clavicle.

Sternal Head --> anterior surface of the sternum

I: Lateral lip of intertubercular groove of the humerus

A: As a whole, adducts and medially rotates the humerus. (can also flex humerus)

Inn: lateral pectoral nerve and medial pectoral nerve
Clavicular head: C5 and C6
Sternocostal head: C7, C8 and T1

O: third to fifth ribs, near their costal cartilages

I: medial border and superior surface of the coracoid process of the scapula

A: stabilizes the scapula by drawing it inferiorly and anteriorly against the thoracic wall

Inn: medial pectoral nerve (C8, T1)

O: spinous processes of thoracic T7-L5, thoracolumbar fascia, iliac crest and inferior 3 or 4 ribs, inferior angle of scapula

I: floor of intertubercular sulcus (medial lip) of the humerus

A: adducts, extends and medially rotates the arm

Inn: Thoracodorsal nerve (C6, C7, C8)

O:

O - subscapular fossa (most of the anterior surface of the scapula)

I - Lesser tubercle of the humerus

A - medially rotates humerus

Inn - upper and lower subscapular nerves (C5, C6, C7)

O - posterior surface of inferior angle of scapula

I - Medial lip of intertubercular sulcus of humerus

A - adduction and medial rotation of humerus

Inn - lower subscapular nerve (C5, C6)

O - Nuchal ligament, spinous processes of C7 and T1

I - smooth triangular area at medial end of scapular spine

A - retract scapula and rotate it to depress the glenoid cavity

Inn - Dorsal Scapular nerve (C4, C5)

O - Spinous processes of T2-T5

I - medial border of scapula from level of spine to inferior angle

A - retract scapula and rotate it to depress the glenoid cavity

Inn - Dorsal Scapular nerve (C4, C5)

O - Lateral superepicondylar ridge of the humerus

I - Dorsal aspect of base of 2nd metacarpal

A - extend and abduct hand at the wrist joint

Inn - Radial nerve (C6, C7)

O - Medial epicondyle of the humerus (common flexor origin)

I - pisiform, hook of hamate, 5th metacapral

A - Flexes and Adducts hand at the wrist

Inn - Ulnar nerve (C7, C8)

O - lateral condyle of tibia, superior half of lateral surface of tibia, and interosseous membrane. 

I - medial and inferior surfaces of medial cuneiform and 1st metatarsal. 

A - Dorsiflexes ankle and inverts foot

Inn - deep fibular nerve (L4, L5)

O - posterior surface of tibia inferior to soleal line, interosseous membrane

I - base of 2nd, 3rd, and 4th metatarsals, sustentaculum tali of calcaneus.

A - plantarflexes ankle, inverts foot

Inn - tibial nerve (L4,L5)

O - ASIS and superior part of notch inferior to it

I - superior aspect of medial part of tibia

A - flexes, ABducts,and and laterally rotates thigh at hip joint. 

Inn - Femoral nerve, (L2, L3)

O - AIIS and ilium superior to the acetabulum

I - common quadriceps tendon and independent attachments to base of patella

A - extends the leg at the knee; also steadies the hip joint and helps the iliopsoas flex thigh

Inn - femoral nerve (L2, L3, L4)

O - ischial tuberosity

I - medial surface of superior part of tibia

A - Extend thigh, flex leg at the knee, when leg is flexed it can medially rotate the leg

Inn - tibial division of sciatic nerve (L5, S1, S2)

O - ischial tuberosity

I - posterior part of medial condyle of tibia (reflected attachment forms oblique popliteal ligament)

A - extend thigh, flex leg and medially rotate it when the knee is flexed

Inn - tibial division of sciatic nerve (L5, S1, S2)

O - long head: ischial tuberosity

short head: linea aspera and lateral supracondylar line of femur

I - lateral side of the head of the fibula

A - flexes leg and rotates it laterally when the knee is flexed, also extends the thigh

Inn - Long head: tibial division of sciatic nerve (L5, S1, S2)

short head: common fibular division of sciatic nerve (L5, S1, S2)

O - Lateral head: lateral aspect of lateral condyle of femur

Medial head: popliteal surface of femur, superior to medial condyle

I - posterior surface of calcaneus via calcaneal tendon

A - plantarflexes ankle when knee is extended, raises heel during walking, flexes leg at the knee joint

Inn - Tibial nerve (S1, S2)

O - posterior aspect of head of fibula, and soleal line and middle third of medial border of tibia

I - posterior surface of calcaneus via calcaneal tendon

A - Plantarflexes ankle independently of position of knee, steadies the leg on the foot

Inn - Tibial nerve (S1, S2)