Muscles: Agonist, Antagonist, Synergist

Flexor digitorum superficialis

Movement: flexion of fingers and wrist Antagonist: extensor digitorum Synergist: flexor digitorum profundus

Flexor hallucis longus

Movement: flexion of the big toe Antagonist: extensor hallicus brevis Synergist: flexor hallicus brevis

Rectus abdominus

Movement: flexion of vertebral column, abdominal compression Antagonist: erector spinae Synergist: internal intercostals, obliques

vastus intermedius

Movement: knee extension Antagonist: hamstrings Synergist: all the quads

vastus lateralis

Movement: knee extension Antagonist: hamstrings Synergist: all the quads

vastus medialis

Movement: knee extension Antagonist: hamstrings Synergist: all the quads

Rectus femoris

Movement: knee extension Antagonist: the hamstrings Synergist:all of the quads

Popliteus

Movement: medial rotation of the tibia/lateral rotation of femur; knee flexion Antagonist: hamstrings ** Synergist:semitendinosus for knee flexion

Deltoid

Movement: shoulder abduction Antagonist: pectoralis major and latissimus dorsi Synergist: teres major and minor, infraspinatus, subscapularis

Supinator

Movement: supination of the forearm Antagonist: pronator teres and quadratus Synergist:biceps brachii

Styloglossus

Movement:Retracts tongue, elevates side of tongue Antagonist:Genioglossus Synergist: Hyoglossus

External anal sphincter

Movement: Closes anal opening, always contracted Antagonist: none Synergist: internal anal sphinter

Subscapularis

Movement: Medial rotation of shoulder Antagonist: Teres minor and infraspinatus Synergist:Teres major and anterior deltoid

Orbicularis oris

Movement: compression and pursing of the lips Antagonist: levators, depressors Synergist: none

Biceps brachii

Movement: elbow flexion Antagonist: Triceps Synergist: brachialis and brachialradialis

Diaphragm

Movement: enlarges the thorax upon inspiration and compresses of abdomen Antagonist: serratus posterior/inferior Synergist: external intercostals upon inspiration/ obliques, transverse and rectus abdominis with compression

Extensor digitorum

Movement: extension of fingers and wrist Antagonist: all the flexor digitorums, flexor carpi and palmaris longus Synergist: all the extensors( digitorium minimi, carpies)

Triceps brachii

Movement: extension of the forearm Antagonist: biceps Synergist: latissimus dorsi, teres major and minor, pectoralis major, anconeus

Inferior oblique

Movement: eye rolling Antagonist: superior oblique Synergist: superior and lateral rectus