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Muscle
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 Click on image for larger view |
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Name
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Gastrocnemius
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Subdivision
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Lateralis
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Muscle Anatomy
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Origin
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Lateral condyle and posterior surface of femur, capsule of knee joint. | |
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Insertion
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Middle part of posterior surface of calcaneus.
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Function
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Flexion of the ankle joint and assist in flexion
of the knee joint.
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Recommended sensor placement procedure
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Starting posture
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Lying on the belly with the face down, the knee
extended and the foot projecting over the end of the table.
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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 1/3 of the line
between the head of the fibula and the heel.
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- orientation
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In the direction of the line between the head of
the fibula and the heel.
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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 ankle or the proc. spin. of C7.
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| Clinical test | Plantar flexion of the foot with emphasis on pulling the heel upward more than pushing the forefoot downward. For maximum pressure in this position it is necessary to apply pressure against the forefoot as well as against the calcaneus. | |
| Remarks |
The SENIAM guidelines also include a separate sensor
placement procedure for the medial gastrocnemius.
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