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21 Cards in this Set

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Forearm Innervation

Radial Nerve: All of the posterior forearm


Median Nerve: Most of the anterior forearm


Ulnar Nerve: Flexor Carpi Ulnaris and half of Flexor Digitorum Profunus

Which bone does pronation / supination?

Radius - NOT the ulna

Brachial A. Breakdown

Breaks down into the Radial and Ulnar A.




Ulnar A. breaks down into the Common Interosseus A.




Common Interosseus A. breaks down into the Anterior and Posterior A.


The common inerosseus A. runs between the radius and ulna



General Properties of Forearm Flexors

Origin: ME of humerus, radius, and ulna


Insertion: Carpals, metacarpals, and phalanges


Innervation: Mostly median


Vascularization: Ulnar A., Radial A., and Anterior Interosseus A.


Action: Flexion of the wrist, digits, and pronation




Mostly 2-joint muscles


3 wrist flexors, 3 digit flexors, 2 pronators

General Properties of Forearm Extensors

Origin: LE of humerus, radius, and ulna


Insertion: Carpal bones, metacarpals, and phalanges


Innervation: Radial N.


Vascularization: Posterior Interosseus A.


Action: Extension of the wrist, digits, and supination

Carpal Tunnel Information

Median N. runs under the flexor retinaculum


Will cut that to relieve pressure

Anatomical Snuff Box

Triangle-shaped depression on the lateral wrist


Lateral: Extensor Pollicis Brevis


Medial: Extensor Pollicis Longus

Elbow Flexion Bone Related

The coronoid process goes into the coronoid fossa

Important Forearm Ligaments

Exist in the elbow joint




Have radial and ulnar collateral ligaments


Annular ligament (or radius): Holds the head of the radius in place




The head isn't very big so it is often displaced, especially common in kids

Which side has more divisions?

Posterior side has more divisions

Anterior and Posterior Vascularization

Anterior: Radial and Ulnar A. and Anterior Interosseous A.




Posterior: Posterior Interosseous A.

Pronator Teres

Origin: ME and coronoid process


Insertion: Middle radius


Innervation: Median N.


Vascularization: Ulnar A.


Action: Pronates and flexes forearm

Flexor Carpi Radialis

Origin: ME


Insertion: Base of 2nd and 3rd MC


Innervation: Median N.


Vascularization: Ulnar A.


Action: Flex the wrist and Abduct

Palmaris Longus

Origin: ME


Insertion: Palmar Aponeurosis


Innervation: Median N.


Vascularization: Ulnar A.


Action: Flex the wrist and tighten the palmar aponeurosis

Flexor Carpi Ulnaris

Origin: Olecranon and posterior ulna


Insertion: Pisiform, hamate, and 5th MC


Innervation: Ulnar N.


Vascularization: Ulnar A.


Action: Flex the wrist and Adduct

Flexor Digitorum Superficialis

Origin: ME, proximal ulna, and anterior radius


Insertion: Side of the 2nd - 5th middle phalanges


Innervation: Median N.


Vascularization: Ulnar A.


Action: Flexes at the middle and proximal 2nd - 5th phalanges

Flexor Digitorum Profundus

Origin: Anterior ulna and interosseous membrane


Insertion: Distal 2nd - 5th distal phalanges


Innervation: Median N. (lateral) and Ulnar N. (medial)


Vascularization: Ulnar A.


Action: Flexes the distal phalanges

Flexor Pollicis Longus

Origin: Distal radius and interosseus membrane


Insertion: Base of distal phalanx of thumb


Innervation: Median N.


Vascularization: Anterior Interosseus A.


Action: Flexes the thumb

Pronator Quadratus

Origin: Distal Ulna


Insertion: Distal Radius


Innervation: Median N.


Vascularization: Anterior Interosseus A.


Action: Pronates the forearm





Supinator

Origin: LE and joint capsule


Insertion: Proximal radius


Innervation: Deep radial A.


Vascularization:


Action: Supinates the forearm




Also biceps brachii and brachioradialis

Brachioradialis

Innervated by the Radial N.




Flexes the forearm at the elbow




Pronates and Supinates?