Lab E3 - Muscle Action

10/30/26 - Muscle Action

Elevates Eyebrows

Frontalis

Fixes Galea Aponeurosis

Occipitalis

Smiling

RZZ w/out I

Risorius = means “smile”, Zygomaticus Major, Zygomaticus Minor

Elevates Upper Lip/Mouth Angle

Levator Labii Superioris, Levator Anguli Oris

Wrinkles Forehead

Corrugator Supercilli

Frowning/Depressing Lower Lip

Depressor Anguli Oris, Depressor Labii Inferioris

Blinking

Orbicularis Oculi

Whistling

BO: Buccinator, Orbicularis Oris

Wrinkles Chin/Tenses Neck

Mentalis, Platysma

Closes Jaw

Masseter, Temporalis

Mastication Muscles

Medial/Lateral Pterygoid

Depresses Hyoid

Thyrohyoid, Sternohyoid, Sternothyroid, Omohyoid

Elevates Hyoid

Digastric, Mylohyoid, Stylohyoid

Flexes Neck

Sternocleidomastoid, Scalenes, Levator Scapulae

Extends Head

Splenius, Trapezius, Semispinalis

Moves Scapula Forward

Pectoralis Minor, Serratus Anterior

Arm Adduction

Pectoralis Major, Teres Major, Latissimus Dorsi, Subscapularis

Arm Abduction

Deltoid, Supraspinous (AB_DS) u c?

Inspiration/Expiration

External Intercostal, Diaphragm - Internal Intercostal

Compresses Abdominal Wall

Rectus Abdominis, External Oblique, Internal Oblique, Transverse Abdominis

Lateral Rotation of Arm

Infraspinous, Teres Minor (LIT)

Stabilize Scapula

Rhomboids Major/Minor

Extend Forearm

Triceps Brachii, Anconeus (ETA)

Flexes Forearm

Biceps Brachii, Brachialis, Brachioradialis

Pronate/Supinate Forearm

Pronator Teres, Pronator Quadratus - Supinator

Flexes Hand

Flexor Carpi Radialis, Flexor Carpi Ulnaris, Palmaris Longus, Flexor Digitorum Superficialis, Flexor Digitorum Profundus

Flexes Thumb

Flexor Pollicis Longus

Extends Hand

Extensor Carpi Radialis Longus/Brevis, Extensor Carpi Ulnaris, Extensor Digitorum

Extends Thumb

Extensor Pollicis Longus/Brevis, Abductor Pollicis Longus

Flexes Thigh

Iliacus, Psoas Major, Sartorius

Adducts Thigh

Pectineus, Adductor Longus, Gracilis, Adductor Magnus (PAGA)

Extends Thigh

Quadriceps Muscles, Biceps Femoris, Semitendinosus, Semimembranosus

Abducts Thigh

Gluteal Muscles (Medius, Maximus, Minimus), Tensor Fascia Lata (ABmERICA GOT TALENT)

Plantar Flexion

Fibularis Longus/Brevis, Gastrocnemius, Soleus, Tibialis Posterior, Flexor Digitorum Longus, Flexor Hallucis Longus

Dorsiflexion

Tibialis Anterior, Extensor Digitorum Longus, Extensor Hallucis Longus

Unlock Knee for Rotation

Popliteus