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Muscle
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 Click on image for larger view |
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Name
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Triceps brachii
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Subdivision
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Long head
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Muscle Anatomy
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Origin
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Infraglenoid tubercle of scapula. | |
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Insertion
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Posterior surface of olecranon process of ulna and
antebrachial fascia.
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Function
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Extension of the elbow joint. The long head also
adducts and may assist in extension of the shoulder joint.
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Recommended sensor placement procedure
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Starting posture
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Sitting with the shoulder at approximately 90 degrees
abduction with the arm 90 degrees flexed and the palm of the hand
pointing downwards.
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Electrode size
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Maximum size in the direction of the muscle fibres:
10 mm.
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Electrode distance
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20 mm
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Electrode placement
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- location
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Electrodes need to be placed at 50 % on the line
between the posterior crista of the acromion and the olecranon at
2 finger widths medial to the line.
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- orientation
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In the direction of the line between the posterior
crista of the acromion and the olecranon.
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- fixation on the skin
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(Double sided) tape / rings or elastic band.
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- reference electrode
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On / around the wrist.
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| Clinical test | Extend the elbow while applying pressure to the forearm in the direction of flexion. | |
| Remarks |
The SENIAM guidelines include also a separate sensor
placement recommendation for the lateral head of triceps brachii.
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