Elbow Flexion

Electrode Placement
Application Instruction by Dr. Lucinda Baker

Electrode placement for bicep stimulation, which will result in elbow flexion. You can see the acromion mark at the shoulder. In this close up of the electrodes you see a relatively small electrode over the muscle belly of the biceps, this is the negative electrode. The positive electrode is placed closer to the crease of the elbow.

Related Electrode Placements

Elbow Flexion

Video Instruction
Audio Transcript:

Electrode placement for bicep stimulation, which will result in elbow flexion. You can see the acromion mark at the shoulder. In this close up of the electrodes you see a relatively small electrode over the muscle belly of the biceps, this is the negative electrode.

The positive electrode is placed closer to the crease of the elbow. The stimulated contraction results in a three out of five muscle grade.

Elbow Flexion

Muscle Anatomy

Muscles involved in elbow flexion:

Biceps Brachii
Origin: Short head: Coracoid process of the scapula.
Long head: supraglenoid tubercle
Insertion: Radial tuberosity and bicipital aponeurosis into deep fascia on medial part of forearm
Other actions: Flexes shoulder, abducts shoulder, supinates radioulnar joint

Brachioradialis
Origin: Lateral supracondylar ridge of the humerus
Insertion: Radial styloid process
Other actions: Supination and pronation of the radioulnar joint

Brachialis
Origin: Anterior surface of the humerus, particularly the distal half of this bone
Insertion: Coronoid process and the tuberosity of the ulna

Elbow Flexion

Nerve Anatomy

Nerves involved in elbow flexion:

Biceps Brachii
Nerve innervation: Musculocutaneous nerve
Nerve root: C5, C6, C7

Brachioradialis
Nerve innervation: Radial nerve
Nerve root: C5, C6

Brachialis
Nerve innervation: musculocutaneous nerve (C5-C7) and radial nerve
Nerve root: Musculocutaneous nerve (C5-C7) Radial nerve C5, C6