Elbow Extension
Electrode Placement
Application Instruction by Dr. Lucinda Baker
This is electrode placement for activation of the triceps muscles which serve as elbow extensors. You can see proximally the mark of the acromion and distally the mark for the olecranon. The negative electrode is placed in the middle of the triceps; the positive electrode is more distal towards the elbow joint itself.
Elbow Extension
Video Instruction
Audio Transcript:
This is electrode placement for activation of the triceps muscles which serve as elbow extensors. You can see proximally the mark of the acromion and distally the mark for the olecranon. The negative electrode is placed in the middle of the triceps; the positive electrode is more distal towards the elbow joint itself.
During the stimulation you can see full elbow extension against gravity which would be graded as a three of five muscle contraction.
Elbow Extension
Muscle Anatomy
Muscles involved in elbow extension:
Triceps Brachii
Origin: Long head: infraglenoid tubercle of
scapula
Lateral head: above the radial groove
Medial head: below the radial groove
Insertion: Olecranon process of ulna
Other actions: Adducts arm, extends shoulder
Elbow Extension
Nerve Anatomy
Nerves involved in elbow extension:
Triceps Brachii
Nerve innervation: Radial nerve and
Axillary nerve
Nerve root: C7
