1. Anteromedial muscles
1.1. Superficial Layer
1.1.1. Palmaris Longus
1.1.1.1. flexor retinaculum and palmar aponeurosis
1.1.1.2. ACTION
1.1.1.2.1. flexes hand at wrist and tenses palmar aponeurosis
1.1.2. flexor Carpi ulnaris
1.1.2.1. Innervation: ulnar n. (C7-C8)
1.1.2.2. Ulnar head
1.1.2.2.1. O: olecrenon and posterior border of Ulna
1.1.2.3. Radial head
1.1.2.3.1. O: common tendon med epicondyle
1.1.2.4. ACTION
1.1.2.4.1. flexes and adducts hand
1.1.2.5. Insertion: Radius, pisiform, hook of hamate, 5th metacarpal
1.1.3. Pronator Teres
1.1.3.1. ulnar head
1.1.3.1.1. O: Coronoid Process. I: radius convexity
1.1.3.2. radial head
1.1.3.2.1. common flexor tendon medial epicondyle. I: radius Convexity
1.1.3.3. ACTION
1.1.3.3.1. Pronates forearm and flexes elbow
1.1.4. flexor carpi radialis
1.1.4.1. I: base of 2nd MCP
1.1.4.2. ACTION
1.1.4.2.1. flexes and radial deviates hand at wrist
1.1.5. Insertion: Medial epicondyle via common flexor tendon
1.1.6. Innervation: Median Nerve (c6-c7) except for FCU
1.2. intermediate layer
1.2.1. flexor digitorum superficialis
1.2.1.1. ACTION
1.2.1.1.1. flexion at PIP joints and MCP joints of digits 2-5
1.2.1.2. Humeroulnar head
1.2.1.2.1. common tendon Medial epicondyle
1.2.1.3. Radial Head
1.2.1.3.1. anterior border
1.2.1.4. Insertion: shafts of middle phalanges digits 2-5
1.3. Deep Layer
1.3.1. Flexor digitorum Profundus
1.3.1.1. ACTION
1.3.1.1.1. flexes DIP of digits 4 and 5
1.3.1.2. Innervation: ulnar nerve
1.3.1.3. Origin: proximal 3/4 medial and anterior ulna and interosseous membrane
1.3.1.4. lateral part
1.3.1.4.1. DIP of digit 2 and 3
1.3.1.5. medial part
1.3.1.5.1. DIP of digit 4 and 5
1.3.2. flexor pollicis longus
1.3.2.1. origin: Anterior Surface of Radius
1.3.2.2. Insertion: Base of distal phalanx of thumb
1.3.2.3. Innervation: Anterior Interosseous Nerve of the Median N (C8-T1)
1.3.2.4. ACTION
1.3.2.4.1. flexes phalanges of thumb
1.3.3. pronator quadratus
1.3.3.1. ACTION
1.3.3.1.1. pronates forearm and binds radius and ulna together
1.3.3.2. Innervation: Anterior Interosseous Nerve from the Median N. (C8-T1)
1.3.3.3. Origin: Distal quarter of anterior ulna
1.3.3.4. Insertion: Distal quarter of anterior radius