Starting Joint Position (Apx. Degrees) Muscles Used Position (right and left are the same) Neck No joint motion Full extension, isometric Splenius Capitis, contractions of the Splenius Cervicis, muscles hold the head in Obliquus capitis, place. Obliquus capitis inferior, Rectus capitis posterior minor, Rectus capitis posterior major Shoulder Scapula Retraction of scapula Middle Trapezius, Rhomboids Trunk/Back No joint motion All vertebra are aligned Erector Spinae, Transversospinalis, Interspinales Elbow Elbow joint Full Extension Triceps, Anconeus assists in elbow extension Wrist Radiocarpal joint Extension/Hyperextension Extensor carpi radialis Midcarpal joint (100 degrees) longus, extensor Carpometacarpal joint MC and CMC glide carpi radialis brevis, assists with extensor carpi ulnaris Radiocarpal motion Phalanges/Hand MCP joints Flexion (90 degrees) Flexor digitorum PIP joints Flexion (30 degrees) superficialis, flexor DIP joints Flexion (45 degrees) digitorum profundus, IP joint Flexion (90 degrees) flexor pollicis longus, flexor pollicis brevis, flexor digiti minimi Hip Hip Extension (90 degrees) Gluteus maximus, Semimembranosus, Semitendinosus, Biceps femoris Knee joint Extension (80 degrees) Rectus femoris, Knee Vastus lateralis, Vastus medialis, Vastus intermedialis
Starting Position (right and left are the same) Joint Position (Apx. Degrees) Muscles Used Neck No joint motion Full extension, isometric contractions of the muscles hold the head in place. Splenius Capitis, Splenius Cervicis, Obliquus capitis, Obliquus capitis inferior, Rectus capitis posterior minor, Rectus capitis posterior major Shoulder Scapula Retraction of scapula Middle Trapezius, Rhomboids Trunk/Back No joint motion All vertebra are aligned Erector Spinae, Transversospinalis, Interspinales Elbow Elbow joint Full Extension Triceps, Anconeus assists in elbow extension Wrist Radiocarpal joint Midcarpal joint Carpometacarpal joint Extension/Hyperextension (100 degrees) MC and CMC glide assists with Radiocarpal motion Extensor carpi radialis longus, extensor carpi radialis brevis, extensor carpi ulnaris Phalanges/Hand MCP joints PIP joints DIP joints IP joint Flexion (90 degrees) Flexion (30 degrees) Flexion (45 degrees) Flexion (90 degrees) Flexor digitorum superficialis, flexor digitorum profundus, flexor pollicis longus, flexor pollicis brevis, flexor digiti minimi Hip Hip Extension (90 degrees) Gluteus maximus, Semimembranosus, Semitendinosus, Biceps femoris Knee Knee joint Extension (80 degrees) Rectus femoris, Vastus lateralis, Vastus medialis, Vastus intermedialis