Knee Extension: Dual Channel Stimulation Tracking
Electrode Placement
Application Instruction by Dr. Lucinda Baker
Electrode placement for knee extension stimulation dual channel for medial tracking. The greater trochanter and the patella are marked. An asymmetric biphasic waveform is used. The negative electrode for channel one is placed over the medialis oblique. The negative electrode of channel two is placed high on the lateral thigh, with the positive electrode plugged into the dual channel lead wire electrode at mid-thigh.
Knee Extension: Dual Channel Stimulation Tracking
Video Instruction
Audio Transcript:
Electrode placement for knee extension stimulation dual channel for medial tracking. The greater trochanter and the patella are marked. An asymmetric biphasic waveform is used. The negative electrode for channel one is placed over the medialis oblique. The positive lead is placed in the dual channel leadwire electrode at mid-thigh.
Channel one leads by two to three seconds during the stimulation to allow the patella to track medially. Channel two is then brought in to create full knee extension stimulation. The quality of the stimulated contraction is three out of five.
Knee Extension: Dual Channel Stimulation Tracking
Muscle Anatomy
Muscles involved in knee extension:
Rectus Femoris
Origin: Straight head from anterior inferior
iliac spine. Reflected head from groove just
above acetabulum
Insertion: Base of Patella
Vastus Intermedius
Origin: Superior half of anterior and Lateral
surfaces of femur
Insertion: Lateral border of Patella
Vastus Medialis
Origin: Superior half of anterior and medial
surfaces of femur
Insertion: Medial condyle of tibia
Vastus Lateralis
Origin: Superior half of anterior and Lateral
surfaces of femur
Insertion: Lateral border and Base of Patella
Sartorius
Origin: Anterior Superior iliac spine
Insertion: Supero-medial tibia
Other actions: Hip flexion, lateral hip rotation
Knee Extension: Dual Channel Stimulation Tracking
Nerve Anatomy
Nerves involved in knee extension:
Rectus Femoris
Nerve innervation: Muscular branches of
femoral nerve
Nerve root: L2, L3, L4
Vastus Intermedius
Nerve innervation: Muscular branches of
femoral nerve
Nerve root: L2, L3, L4
Vastus Medialis
Nerve innervation: Muscular branches of
femoral nerve
Nerve root: L2, L3, L4
Vastus Lateralis
Nerve innervation: Muscular branches of
femoral nerve
Nerve root: L2, L3, L4
Sartorius
Nerve innervation: Femoral nerve
Nerve root: L2, L3, L4
