Muscular System Actions (Bilateral)

A complete set of vocabulary flashcards covering human muscles and their corresponding anatomical actions based on the lecture notes.

Frontalis

Elevates eyebrows

Occipitalis

Pulls Scalp Posteriorly

Orbicularis Oculi

Closes the eye

Zygomaticus Minor

Elevates lateral portion of upper lip

Zygomaticus Major

Pulls the angle of the mouth superiorly and laterally

Risorius

Pulls angle of the mouth laterally

Orbicularis Oris

Closes and protrudes lips

Buccinator

Pulls cheeks in

Platysma

Depresses lower lip and mandible

Masseter

Elevates mandible

Temporalis

Elevates and retracts mandible

Medial Pterygoid

Elevates and protracts mandible

Lateral Pterygoid

Protracts and depresses mandible

Sternocleidomastoid

Flexes the head

Scalenes

Elevate rib cage and vertebral column in inspiration

Trapezius (superior section)

Extends the head

Erector Spinae

Extends the vertebral column

Latissimus Dorsi

Adducts, extends, and medially rotates the arm

Quadratus Lumborum

Extends the vertebral column

Trapezius Muscle (all sections)

Retracts, depresses, elevates and rotates the scapula superiorly

Rectus Abdominis

Flexes the trunk; compresses abdominal cavity

External Oblique

Flexes and laterally flexes trunk; compresses abdominal cavity

Internal Oblique

Flexes and laterally flexes trunk; compresses abdominal cavity

Transverse Abdominis

Compresses abdominal cavity

Pectoralis Major

Flexes and adducts the arm; rotates arm medially

Pectoralis Minor

Protracts and depresses scapula

Serratus Anterior

Protracts and rotates scapula superiorly

Levator Scapulae

Elevates scapula

Rhomboid Major & Minor

Retracts scapula

Deltoid

Abducts, flexes, and extends arm

Teres Major

Adducts, extends, and rotates arm medially

Supraspinatus

Assists abduction; holds humerus and stabilizes shoulder

Infraspinatus

Externally rotates humerus; stabilizes shoulder

Teres Minor

Externally rotates humerus; stabilizes shoulder

Biceps Brachii

Supinates and flexes forearm

Brachialis

Flexes forearm

Triceps Brachii

Extends forearm

Pronator Teres

Pronates Forearm

Flexor Carpi Radialis

Flexes and abducts hand

Palmaris Longus

Flexes hand

Flexor Carpi Ulnaris

Flexes and adducts hand

Flexor digitorum superficialis

Flexes fingers and hand

Extensor Carpi Radialis Brevis

Extends and abducts hand

Extensor Carpi Radialis Longus

Extends and abducts hand

Extensor Digitorum

Extends fingers and hand

Extensor Digiti Minimi

Extends 5th Finger

Extensor Carpi Ulnaris

Extends and adducts hand

Brachioradialis

Flexes forearm

Iliacus

Flexes thigh

Psoas Major

Flexes thigh; flexes and laterally flexes vertebral column

Sartorius

Flexes thigh and leg; abducts and laterally rotates thigh

Adductor longus

Adducts, flexes, and rotates thigh medially

Gracilis

Adducts and rotates thigh medially; flexes the leg

Rectus Femoris

Extends the leg and flexes thigh

Vastus Lateralis

Extends leg; stabilizes patella

Vastus Medialis

Extends leg; stabilizes patella

Vastus Indermedius

Extends Leg

Gluteus Maximus

Extends, laterally rotates, and abducts thigh

Gluteus Medius

Abducts and rotates thigh medially; stabilizes pelvis while walking

Biceps Femoris

Extends thigh; flexes leg

Semitendinosus

Extends the thigh; flexes the leg

Semimembranosus

Extends the thigh; flexes the leg

Tibialis Anterior

Dorsiflexes and inverts foot

Extensor Digitorum Longus

Extends toes; dorsiflexes foot

Extensor Hallucis Longus

Extends hallux; dorsiflexes foot

Fibularis Longus

Everts and plantarflexes foot

Fibularis Brevis

Everts and plantarflexes foot

Gastrocnemius

Plantarflexes foot, flexes leg

Soleus

Plantarflexes foot