MUSCLES OF THE BODY Mastication (Eating) Muscles Image Muscle Bones Connected To The Muscle Temporalis - The Skull (Temporal Bone) Elevate the jaw (Closes the mouth) - The Mandible Elevate and Retract the jaw (Closes the mouth) Masseter Action Muscles of the Face and Neck Image Muscle Orbicularis Oculi Bones Connected To The Muscle - The Skull Action Closes the eyes (causes blinking and squinting) Orbicularis Oris - The Skull - The Mandible Closes Lips (causes the pursing of lips) Sternocleidomastoid - The Skull - The Mandible - The Sternum - The Clavicle Flexes and Laterally rotates head Muscles of the Pectoral Girdle (The Chest and Upper Back) Image Muscle Bones Connected To The Muscle Action Deltoid - The Scapula - The Sternum Responsible for arm abduction Pectoralis Minor (behind petoralis major) - The Ribs Rotates and protracts scapula Pectoralis Major - The Ribs - The Sternum Flexes the arm Rotates the arm medially Adducts the arm Trapezius (on upper back) - The Skull (Occipital Bone) - The Spine (Cervical and Thoracic Regions) Stabilizes, elevates, retracts, and rotates the scapula Teres Minor (on upper back) - The Scapula Laterally Rotates Arm Teres Major (on upper back) - The Scapula Extends, medially rotates, and adducts the arm Latisimus Dorsi (on lower back) - The Spine (Thoracic Region) - The Ribs - The Scapula - The Illium (Part of the Pelvis) Extends the arm Adducts and medially rotates the arm Muscles of the Abdominal Wall (The Stomach) Image Muscle External Oblique Bones Connected To The Muscle - The Ribs Action Trunk rotation and lateral flexion (between arm and trunk) Internal Oblique (behind external oblique) Rectus Abdominis - The Illium - The Lumbar Region of the Spine Works together with external oblique for Trunk rotation and lateral flexion (between arm and trunk) - The Pelvic Bone Flexion of the trunk Stabilizes body while walking Muscles of the Anterior and Posterior Arm Image Muscle Bones Connected To The Muscle Action Biceps Brachii - The Scapula - The Radius Flexes and supinates the forearm Triceps Brachii - The Humerus - The Scapula - The Ulna The three “heads” of the triceps brachii Extend the forearm Muscles of the Anterior and Posterior Forearm Image Muscle Bones Connected To The Muscle Action Brachioradialis - The Humerus - The Radius - The Ulna flexes the forearm at the elbow Pronator Teres - The Radius Pronates the forearm Supinator - The Radius - The Ulna supinate the forearm Muscles of the Anterior Thigh Image Muscle Sartorius Bones Connected To The Muscle - The Pelvis - The Femur - The Tibia Action Flexes, abducts, and laterally rotates the thigh Flexes the Leg Iliopsoas (Iliacus and psoas major) - The Pelvis - The Spine Thigh and Trunk Flexion Lateral Flexion of the Vertebral Column Pectineus - The Pelvis - The Femur Adducts, Flexes, and Medially Rotates the Thigh Quadriceps Femoris (Quads) Rectus Femoris - The Patella - The Pelvis Extends the Leg and Flexes Thigh Vastus Lateralis - The Femur Extends the leg and stabilizes the knees Vastus Medialis - The Femur Extends the leg Vastus Intermedius (hidden behind the vastus lateralis) - The Femur Extends the leg Hip Adductor Muscles Gracilis (inner thigh) - The Pelvis - The Tibia Adducts the thigh Flexes and Medially Rotates the Leg Adductor Longus (in the inner thigh) - The Pelvis Adducts, Flexes and Medially Rotates the Thigh Adductor Brevis - The Pelvis Adducts and medially rotates thigh Adductor Magnus (hidden behind the hamstrings) - The Pelvis - The Femur Adducts, Medially Rotates, and Flexes the Thigh Also Extends the Thigh Gluteus Muscles (Butt Muscles) Gluteus Maximus - The Pelvis - The Femur Major Extensor of the Thigh Gluteus Medius - The Pelvis - The Femur Abducts and medially rotates the thigh Gluteus Minimis - The Pelvis - The Femur Abducts and medially rotates the thigh Muscles of the Posterior Thigh Image Muscle Bones Connected To The Muscle Action Piriformis (deep behind the gluteus maximus) - The Pelvis Rotates and Extends the thigh laterally Quadratus Femoris - The Pelvis Rotates and Extends the thigh laterally Hamstring Muscles Bicep Femoris - The Femur - The Tibia - The Fibula Extends the thigh and flexes the leg Semitendinosus - The Tibia Extends the thig and flexes the leg Semimembranosus - The Tibia Extends thigh and flexes leg Muscles of the Lower Leg Image Muscle Bones Connected To The Muscle Action Lateral (Side) Muscles Fibularis (Peroneus) Longus - The Fibula Plantar Flexion and Foot Eversion Fibularis (Peroneus) Brevis - The Fibula Plantar Flexion and Foot Eversion Posterior (Back) Muscles Gastrocnemius Soleus - The Femur - The Calcaneus Plantar Flexion of Foot - The Tibia - The Fibula Plantar Flexion, Foot Inversion, and Toe Flexion Anterior (Front) Muscles Tibialis Anterior - The Tibia - The Metatarsals Primarily responsible for Dorsiflexion Fibularis (Peroneus) Tertius - The Fibula - The Metatarsals Dorsiflexion and Eversion of the Foot Tibialis Posterior - The Tibia - The Fibula - The Calcaneus Prime Mover and Inversion of Foot
