Question

Provide eight examples of biarticular muscles found in the upper and lower extremity (4 upper extremity and 4 lower extremity). Further, state all of the joint motions contributed by each muscle

Answer 1

Upper extremity: Biarticular
Biceps brachii- flexes the forearm and supinate the forearm
Triceps brachii -lateral head contribute to the extension of the elbow
brachioradialis - flexion of the elbow joint and extension
Triceps brachii-long head -flexion and extension of the arm at the shoulder
Lower extremity: biarticular
Rectus femoris - knee flexion and hip flexion
Gastrocnemius -plantar flexion of the foot at the ankle joint, flexing knee joint
Hamstring muscle -hip extension, knee flexion and rotation of the lower leg and bend the knee
Gluteus muscle- the movement of hip and thigh