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Per Rainoldi et al. 2004 Thigh Anterior Right

M. Vastus Intermedius

Vastus Intermedius (Vast Int R)

The M. Vastus Intermedius (Vastus Intermedius) is a muscle of the thigh anterior region. It is responsible for knee extension (deepest quadriceps component, beneath rectus femoris). This muscle is not covered by the official SENIAM catalogue — placement is based on established clinical literature. This page documents the exact electrode position, anatomical attachments and a standardized test movement based on Hermens et al. (2000).

Function

Knee extension (deepest quadriceps component, beneath rectus femoris)

Opposite side: Vast Int L
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Anatomy

Origin Anterior and lateral surfaces of the femoral shaft (proximal 2/3) Insertion Base of the patella (deep) -> via patellar ligament to the tibial tuberosity

Test Movement

Knee extension in sitting against resistance (EMG recording difficult due to deep position)

This muscle has no SENIAM-standardized electrode position. Placement should be based on anatomical knowledge.

Related Muscles in This Region

M. Rectus Femoris Rectus Femoris SENIAM M. Vastus Lateralis Vastus Lateralis SENIAM M. Vastus Medialis Vastus Medialis SENIAM M. Sartorius Sartorius
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