Muscle Monday

Sternocleidomastoid Location – Neck Movement – Neck Flexion and rotation

Pectoralis Major Location – Chest Movement – Internal Rotation Shoulder Horizontal Adduction

Pectoralis Minor Location – Chest Movement – Scapula Depression

Biceps Brachii Location- Anterior upper arm Movement – Elbow Flexion Forearm Supination

Triceps Brachii Location – Back of the arm Movement – Elbow Extension

Gluteus Maximus Location – Butt Backside Movement – Hip extension. Hip external rotation. Hip abduction.

Supraspinatus Location – Top of the shoulder On the scapula Movement – Shoulder abduction External Rotation Extra Part of the rotator cuff. Stabilizes the humeral head in the glenoid fossa. Action is controversial.

Infraspinatus Location – Scapula Back Movement – External rotation Helps to hold head of humerus in gleniod cavity. Stabilizing shoulder joint Extra Part of Rotator Cuff.

Teres Minor Location – Back Inferior scapula Movement – Shoulder External Rotation. Helps hold humeral head in glenoid cavity.

Subscapularis Location – Inside of the scapula Movement – Shoulder Internal Rotation Shoulder Adduction

Trapezius Location- Upper Back Movement – Raises (elevates) shoulder

Latissimus Dorsi Location – Inferior back Movement – Shoulder Adduction Shoulder Extension Shoulder Internal rotation

Brachialis Location – Proximal to the elbow in supination. Movement – Elbow flexion

Anterior Deltoid Location – Superior and anterior aspect of the shoulder. Movement – Shoulder Flexion Shoulder Internal rotation

Rectus Femoris Location- Middle, Front Thigh Movement – Knee Extension Hip Flexion

Gluteus Medius Location- Back side. Buttocks Movement- Hip extension Hip Abduction Extras Important in walking Muscle of limb planted on ground tilts or holds pelvis in abduction so that pelvis on side of swinging limb does not sag. The foot of swinging limb can thus clear the ground.

Serratus Anterior Location – Side of the rib cage Movement – Scapular protraction

Anterior Tibialis Location – Front of lower leg Movement – Dorsiflexion of ankle. Extra Muscle associated with shin splints.

Gracilis Location – Inside of the thigh. Movement – Hip adduction, flexion, and internal rotation.

Brachioradialis Location – Front of forearm. Movement – Elbow Flexion Forearm Pronation Forearm Supination

Flexor Digitorum Superficialis Location – Anterior aspect of the elbow in supination. Movement – Flexes proximal phalanges at matacarpophalangeal (MCP) joints. Flexes middle phalanges at proximal interphalangeal (PIP) joints of medial 4 fingers.

Iliopsoas Combination of 3 muscles: 1.Psoas major 2.Psoas minor 3.Iliacus Location – Abdomen Movement – Torso Flexion Hip Flexion

Rhomboid Major Location – Back Between the scapula and the spine Movement – Scapular retraction

Sartorius Location – Anterior aspect of the thigh Medial aspect of the knee. Movement – Hip Flexion Hip External Rotation Knee Flexion.

Levator Scapulae Location – Back of the neck. Movement – Scapula Elevation.

Semimebranosus Location – Back of the thigh. Movement – Knee Flexion Hip extension and internal rotation.

Biceps Femoris Location – Back of the thigh. Movement – Knee Flexion Hip extension

Semitendinosus Location – Posterior aspect of the thigh. Movement – Knee Flexion Hip Extension

Posterior Deltoid Location – Top and posterior of shoulder Movement – Shoulder Extension

Gluteus Minimus Location – Lateral aspect of the hip. Movement – Hip Abduction Hip Internal rotation.

Palmaris Longus Location- Inside of forearm Movement- Weak wrist flexion Tenses skin and fascia of palm during hand movements. Extra Some people don’t have one (14%) Touch your pointer finger with your 5 th finger and flex your wrist to see it.

Pronator Teres Location – Anterior aspect of the elbow in supination. Movement – Forearm Pronation Elbow Flexion

Peroneus Longus Location – Lateral, lower leg Movement – Ankle Eversion. Ankle Plantarflexion

Rhomboid Minor Location – Upper back Between scapula and spine Movement – Retract scapula

Adductor Brevis Location – Inside of thigh Movement – Adducts hip.

Teres Major Location – Back Lower scapula Movement – Shoulder adduction Shoulder internal rotation

Middle Deltoid Location- Top of shoulder Upper arm Movement- Shoulder Abduction

Vastus Lateralis Location – Anterior aspect of thigh. Movement – Knee Extension

Vastus Medialis Location – Front of thigh Movement – Extends knee Extras Part of the Quadriceps muscle group. Tear drop on the inside is called the ‘oblique.’

Vastus Intermedius Location – Anterior aspect of the thigh. Movement – Knee Extension

Soleus Location – Posterior aspect of the lower leg. Under the gastrocnemius. Movement – Ankle Plantarflexion

Pectineus Location – Inside of the thigh. Movement – Hip Adduction Hip Flexion

Gastrocnemius Location – Posterior lower leg Movement – Plantarflexes foot when knee extended Knee flexion when ankle dorsiflexed

Tensor Fasciae Latae Location – Lateral aspect of the upper leg. Movement – Helps stabilize the hip and knee by putting tension on the iliotibial band of fascia.

Adductor Longus Location – Inside of the thigh Movement – Adduction of the hip

Adductor Magnus Location – Medial aspect of the thigh. Movement – Hip Adduction