Week #2 - Muscles of the Brachium and Antebrachium

Anterior Antebrachium - Intermediate Group

Flexor Digitorum Superficialis - Orange

Attachments: Common Flexor Tendon, coronoid process of ulna, proximal 1/2 of anterior shaft of radius and digits 2-5 on proximal point of intermediate phalange

Innervation: Median nerver - C7, C8 and T1

Actions: Flexes digits 2-5 and the wrist

Deep Group

Flexor Digitorum Profundus - Brown

Attachments: Proximal 1/2 of medial and anterior ulna, interosseous membrance and base of the distal phalanges of digits 2-5

Innervation: Median Nerve - C8 and T1

Actions: Flexion of digits 2-5 and the wrist
Superficial Group of the Antebrachium

Flexor Carpi Radialis - Brown

Attachments:Common Flexor Tendon

Innervation: Median Nerve C6 and C7

Actions: Flexion and radial deviation (abduction) of the wrist

Palmaris Longus - Orange

Attachments: Common Flexor Tendon and anterior base of 2nd and 3rd metacarpals

Innervation: Median Nerve C7 and C8

Actions:Flexion of the wrist

Flexor Carpi Ulnaris - Green

Attachments: Common Flexor Tendon, pisiform, hook of hamate, and base of the 5th metacarpal

Innervation: Ulnar Nerve C7 and C8

Actions: Ulnar deviation (adduction) and flexion of the wrist

Anterior Brachial Compartment

Coracobrachialis - Superior Green

Attachments: Coracoid process and medial shaft of humerus

Innervation: Musculocutaneous Nerve C5, C6, C7

Actions: Adduction and flexion of the humerus - if laterally rotated wouldn't this do medial rotation?

Brachialis - Red

Attachments: Ulnar Tuberosity and distal 1/2 of anterior shaft of humerus

Innervation: Musculocutaneous Nerve C5, C6, C7

Actions: flexion of the antebrachium

Biceps Brachii - Brown

Attachments: Coracoid process, Supraglenoid tubercle, radial tuberosity

Innervation: Musculocutaneous Nerve C5 and C6

Actions: flexion, abduction/adduction of humerus, flexion and supination of antebrachium

Superficial Group of Antebrachium - Pronator Teres - Inferior Green

Attachments: Common Flexor Tendon (medial epicondyle), coronoid process of ulna and lateral radius (approx. 1.3 inferior/distal)

Innervation: Median Nerve C6 and C7

Actions: Pronation and flexion of antebrachium

Posterior Brachial Compartment - Triceps Brachii

Attachments: Infraglenoid Tubercle of scapula and posterior shaft of humerus

Innervation: Radial Nerve

Actions: Extension and adduction of shoulder and extension of humerus and antebrachium

Week #1 - SITS and RRLTSP muscles

Posterior view
Rhomboid Minor - Light blue

Attachments: SP of C7 to T1

Innervation: Dorsal Scapular nerve - C4 and C5

Actions: Elevation, retraction (adduction) and downward rotation of the scapula

Rhomboid Major - Turquoise

Attachments: SP of T2 to T5

Innervation: Dorsal Scapular Nerve - C4 and C5

Actions: Elevation, retraction (adduction) and downward rotation of the scapula

Levator Scapulae - Superior Green

Attachments: Superior angle of the scapula and TP of C1 to C4

Innervation: Dorsal Scapular Nerve C3 to C5

Actions: Elevation of the scapula, extension and lateral flexion of the neck

Supraspinatus - Brown

Attachments: supraspinous fossa and the greater tubercle of the humerus

Innervation: Suprascapular nerve - C5 and C6

Actions: Abduction and flexion of the Humerus

Infraspinatus - Fuschia

Attachments: Infraspinous fossa and the greater tubercle of the humerus

Innervation: Suprascapular Nerve - C5 and C6

Actions: Lateral rotation of the humerus

Teres Minor - Inferior Green

Attachments: Superior lateral border of the scapula

Innervation: Axillary Nerve - C5 and C6

Actions: Lateral rotation of the humerus

Anterior View

Pectoralis Minor

Attachments:Ribs 3, 4, 5 and Coracoid Process

Innervations: Medial and Lateral Pectoral Nerves C5 to T1

Actions: Depression, protraction and downward rotation of scapula elevation of ribs 3-5

Lateral View

Serratus Anterior

Attachments: Anterior medial border of the scapula and ribs 1-9 anterolaterally

Innervation: Long Thoracis Nerve - C5 to C7

Actions: Protration and upward rotation of the scapula
Posterior View

Subscapularis - Turquoise (drawn on posterior side - scapula has been ghosted/taken off)

Attachments: subscapular fossa (anterior) and lesser tubercle of humerus

Innervation: Upper/Lower Subscapular Nerves - C5 and C6

Actions: medial rotation of the humerus

Posterior View

Trapezius - Fuschia

Attachments: SP C7 to T12 (general area), EOP, Nuchal Ligament, lateral 1/3 of the clavicle, acromion process, and spine of the scapula

Innervation:Spinal Accessory Nerve C3 to C4

Actions: elevation/depression, retraction, upward/downward rotation of the scapula, extension, contralateral rotation and lateral flexion of head and neck