Hip Extension

Electrode Placement
Application Instruction by Dr. Lucinda Baker

Electrode placement for hip extension. The iliac crest is marked with a line, and the greater trochanter is marked with the X. Electrodes are placed over the proximal and distal components of the gluteus maximus, with at least one inch between these relatively large electrodes.

Related Electrode Placements

Hip Extension

Video Instruction
Audio Transcript:

Electrode placement for hip extension. The iliac crest is marked with a line, and the greater trochanter is marked with the X. Electrodes are placed over the proximal and distal components of the gluteus maximus, with at least one inch between these relatively large electrodes.

If treatment is going to be done in the upright position, electrode placement should be upright. During stimulation you see a three minus out of five contraction of the hip extensors in this un-weighted position.

Hip Extension

Muscle Anatomy

Muscles involved in hip extension:

Gluteus Maximus
Origin: Gluteal surface of ilium, lumbar fascia, sacrum, sacrotuberous ligament
Insertion: Femoral gluteal tuberosity and iliotibial tract
Other actions: Hip external rotation

Biceps Femoris
Origin: Tuberosity of the ischium, femoral linea aspera
Insertion: Head of the fibula articulating with the back of the lateral tibial condyle
Other actions: Knee flexion, laterally rotates knee when is flexed

Semimembranosus
Origin: Ischial tuberosity
Insertion: Medial condyle of tibia
Other actions: Knee flexion

Semitendinosus
Origin: Lower quadrangular part of ischial tuberosity
Insertion: Pes anserinus – distal tendon of the semitendinosus, gracilis and sartorius
Other actions: Knee flexion

Hip Extension

Nerve Anatomy

Nerves involved in hip extension:

Gluteus Maximus
Nerve innervation: Inferior gluteal nerve
Nerve root: L5, S1, S2

Biceps Femoris
Nerve innervation: Tibial nerve (long head) common fibular nerve (short head)
Nerve root: L5, S1

Semimembranosus
Nerve: Tibial part of the sciatic nerve
Nerve root: L5, S1, S2

Semitendinosus
Nerve innervation: Tibial part of the sciatic nerve
Nerve root: L5, S1, S2