1) site of injection: anterolateral thigh; muscle: vastus lateralis muscle (origin: greater trochanter and linea aspera of femur; insertion: patella via quadriceps tendon and tibial tuberosity via patellar ligament; extends leg at knee joint); location: proximal half of intertrochanteric line
2. Deltoid; origin: acromial extremity of clavicle, acromion of scapula, and spine of scapula; insertion: deltoid tuberosity of humerus; action: lateral fibers abduct arm at shoulder joint; location: lateral third of the clavicle