Download ANTERIOR ANTEBRACHIUM

ANTERIOR
ANTEBRACHIUM
Muscles

Common function:
Wrist and digital flexion.

Common origin:
Medial epicondyle of humerus.
Muscles

Superficial (from superior-inferior and
lateral-medial):
[Brachioradialis]
Pronator teres
Flexor carpi radialis
Palmaris longus
Flexor carpi ulnaris
Intermediate Muscle Group

Flexor digitorum superficialis:
To middle phalanx of digits II through V.
Deep Muscle Group
Ulnar head of pronator teres.
 Flexor digitorum profundus.
 Flexor pollicis longus.

To distal phalanx of thumb.
From radius and interosseous membrane.

Pronator quadratus.
Radial Artery
Smallest terminal branch of brachial artery.
 Proximally lies deep to brachioradialis.
 Distally becomes superficial between
brachioradialis and flexor carpi radialis.

Ulnar Artery

Middle third of forearm:
Joined by ulnar nerve.
Lies under flexor carpi ulnaris.

Distal third of forearm:
Superficial and lateral to tendon of flexor
carpi ulnaris.
Adjacent and lateral to ulnar nerve.
Ulnar Artery Branches
Anterior ulnar recurrent (to inferior ulnar
collateral)
 Posterior ulnar recurrent (to superior ulnar
collateral)
 Common interosseous:

Anterior interosseous
Posterior interosseous
Median Nerve
Supplies all other muscles in the anterior
compartment not supplied by the ulnar
nerve.
 Functional neurological level = C7
 Gives off anterior interosseous nerve.

Median Nerve Route
Crosses anterior cubital fossa medial to
brachial artery.
 Passes between the two heads of the
pronator teres.
 Travels between the flexor digitorum
superficialis and flexor digitorum
profundus.

Ulnar Nerve

To:
Flexor carpi ulnaris
Half of flexor digitorum profundus
Ulnar Nerve Route
From posterior compartment of brachium
 Through sulcus in medial epicondyle
 Into antebrachium between two heads of
flexor carpi ulnaris
 Extends between flexor carpi ulnaris and
flexor digitorum profundus.

Relationships
Ulnar artery to ulnar nerve, flexor carpi
ulnaris, pisiform, Guyon’s canal.
 Median nerve to flexor digitorum
superficialis and transverse carpal
ligament.
 Superficial palmar branch of median nerve
to transverse carpal ligament.

Relationships
Radial artery to superficial branch of radial
nerve and brachioradialis.
 Anterior interosseous nerve and artery to
pronator quadratus.
