Lateral Raise

Primary: Medial Deltoid
Secondary: Anterior Deltoid, Posterior Deltoid
Range of Motion: Seated, arms at sides, bent at elbow. Raise arms at shoulder joint until even with shoulders.
Opposing Exercise: Dip Assist

Rear Deltoid

Primary: Trapezeus, Posterior Deltoid, Rhomboids.
Range of Motion: Seated, facing machine, with arms extended forward. Swing arms at shoulder joint until they are both pointing sideways.
Opposing Exercise: Pectoral Fly

Chin Assist

Primary: Anterior Deltoid
Secondary: Biceps
Range of Motion: Kneeling on a pad, grab bar above and pull up.
Opposing Exercise: Lateral Raise

Shoulder Press
(Machine or Plate Loaded, inclined or not inclined)

Primary: Anterior Deltoid
Secondary: Medial Deltoid, Triceps
Range of Motion: Gripping bars at shoulder level, push up.
Opposing Exercise: Seated Dip