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Objective 4 of Muscular System: List a primary action for each identified musclen
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Occipitofrontalis (Frontal & Occipital Belly)
moves up the scalp and eyebrows
Orbiculais oculi
closes eye
Orbicularis oris
Compress lips
Levator labii superioris
elevates upper lip
Zygomaticus
elevates corners of mouth (smile)
Depressor anguli oris
Draws corners of mouth down (frown)
Depressor labii inferioris
Lowering lower lip (depression of lower lip)
Temporalis
Elevates mandible (synergist with masseter)
Masseter
Elevates mandible (synergist with temporalis)
Sternocleidomastoid
Flexes your neck
Trapezius
Extends your neck (Helps keep head in an upright position)
External Intercostals
Elevates the ribcage (Inhalation)
Internal Intercostals
Depress the ribcage (Exhalation)
Pectoralis major
Flexion & abduction of the shoulder
Pectoralis minor
Protacts scapula
Serratus anterior
Protacts scapula
Latissimus Dorsi
Extension @ shoulder, adduction of the arm
Diaphragm
Expand thoracic cavity (Separates the thoracic and abdominal cavities)
Rectus abdominus
Flexion of vertebral column
Rectus abdominus: Linea Alba
Flexion of vertebral column
Rectus abdominus: External Obliques
Flexion of vertebral column
Rectus abdominus: Internal Obliques
Flexion of vertebral column
Rhomboideus major
Retracts Scapula
Infraspinatus
Adduct shoulder
Supraspinatus
Abduct shoulder
Subscapularis
Medially rotate shoulder
Teres major
Medially rotate shoulder
Teres minor
Laterally rotate shoulder
Deltoid
Extend arm
Biceps Brachii
Flex forearm
Brachialis
Flex forearm
Triceps brachii
Extend forearm
Brachioradialis
Flex forearm
Extensor carpi radialis longus
Extend wrist
Extensor digitorum
Extend wrist
Extensor carpi ulnaris
Extend wrist
Flexor carpi ulnaris
Flex wrist
Palmaris longus
Flex wrist
Flexor carpi radialis
Flex wrist
Pronator teres
Pronate forearm
Gluteus maximus
Extend thigh
Tensor fasciae latae
Abduct thigh
Iliotibial tract
Stabilization of the hip and knee joints
Gracilis
Adduct thigh
Sartorius
Laterally rotate thigh
Rectus femoris
Extend leg
Vastus medialis
Extend leg
Vastus lateralis
Extend leg
Biceps femoris
Flex leg
Semitendinosus
Flex leg
Semimembranosus
Flex leg
Tibalis anterior
Dorsiflex foot
Extensor digitorum longus
Dorsiflex foot
Fibularis longus
Evert foot
Soleus
Plantarflex foot
Gastrocnemius
Flex leg
Achilles tendon
Plantarflex foot