Muscle Movements and Muscular Anatomy

Muscle that extends the forearm

• Biceps

• Triceps

• Deltoid

• Pectoralis

Rectus Abdominus: Function

• Flex spine, posture, hold in organs

• Extend spine, improve balance, support limbs

• Rotate spine, enhance flexibility, stabilize joints

• Strengthen core, assist breathing, protect spine

Muscles that oppose or reverse movements are known as

• Agonists

• Synergists

• Antagonists

• Stabilizers

Muscle responsible for shoulder abduction

• Deltoid

• Pectoralis Major

• Trapezius

• Latissimus Dorsi

Muscle used to extend the leg

• Hamstrings

• Quadriceps

• Gastrocnemius

• Gluteus Maximus

Flexes forearm

• Biceps

• Triceps

• Deltoid

• Pectoralis

Muscle used for plantar flexion

• Gastrocnemius

• Quadriceps

• Biceps Brachii

• Deltoid

Muscles that contribute little movement but help by restricting unnecessary movements are called

• Antagonists

• Synergists

• Agonists

• Stabilizers

Pectoralis: Function

• Adducts & moves arm across chest

• Extends the arm backward

• Rotates the arm outward

• Elevates the shoulder

Muscle that flexes the leg

• Quadriceps

• Hamstring

• Calf Muscle

• Gluteus Maximus