bio 201 muscles

muscle name & function

Brachialis (below the muscle) (elbow flexion- bringing spoon to mouth)

muscle & function

biceps brachii - flexes elbow, supinates forearm (scooping up water in hand to drink)

muscle name & function

brachioradialis - flexes the elbow

muscle name & function

extensor carpi radialis - extends wrist, radially deviates wrist

muscle name & function

triceps brachii (posterior) - elbow extension

muscle name & function

extensor carpi radialis? - extends wrist, radially deviates wrist (aBduction) (moves hand towards thumb side)

muscle name & function

Flexor Digitorum? - flexes digits of the hand and wrist

muscle name & function

Pronator Teres - pronates forearm at elbow (turning a doorknob laterally)

muscle name & function

Extensor Digitorum - extends digits of the hand and wrist

muscle name & function

Extensor Carpi Ulnaris - extends wrist, ulnar deviates wrist (aDduction) (moves hand toward the pinky side)

muscle name & function

Flexor Carpi Ulnaris - flexes wrist, ulnar deviates wrist (aDduction)

muscle name & function

Middle Deltoid - abducts humerus at shoulder (as in upward flap)

muscle name & function

Posterior Deltoid - extension & lateral rotation of humerus

muscle name & action

Anterior Deltoid - flexion & medial (internal) rotation of the shoulder

muscle name & action

Teres Minor (posterior) - external (lateral) rotation of the shoulder

muscle name & action

Pectoralis Major - flexion, and medial (internal) rotation of the shoulder

muscle name & action

Supraspinatus - abducts shoulder

muscle name & action

Latissimus Dorsi - extension, and medial (internal) rotation of the shoulder

muscle name & action

Subscapularis (anterior) - internal (medial) rotation of the shoulder

muscle name & action

Infraspinatus (posterior) - external (lateral) rotation of the shoulder

muscle name & function

Frontalis - raise eyebrows

muscle name & function

Orbicularis Oculi - closes eye (squint), lowers eyebrows

muscle name & function

Orbicularis Oris - Closes lips (purses, protrudes)

muscle name & function

Zygomaticus Major - Raises corners of mouth (smile)

muscle name & function

Buccinator - compress cheeks (whistling, sucking)

muscle name & action

Platysma - pulls lower lip down (as in frowning)

Depresses mandible (opening mouth as when chewing or surprised)

muscle name & action

Masseter - elevates mandible (as in closing mouth while chewing)

muscle name & function

Temporalis - elevates mandible

muscle name & function

Sternocleidomastoid -

Both sides: flexes neck (as in looking down)

One side: cocks head

muscle name & action

Splenius Capitis -

Both sides: extends neck (as in looking up)

One side: cocks head

muscle name & action

Levator Scapulae (deep view) - elevates & retracts scapula (as in bringing shoulder up & in toward ear

muscle name & action

Upper Trapezius - elevates scapula (as in shrugging)

muscle name & action

Middle Trapezius - Retracts scapula (as in pulling shoulders back) 

muscle name & action

Lower Trapezius - Retracts & depresses scapula (as in pulling shoulders back & down)

muscle name & action

Spinalis Thoracis -

One side: lateral flexion of vertebral column

Both sides: extension & hyperextension of vertebral column

muscle name & action

Rhomboideus Major (deep view) - retracts scapula (as in pulling the shoulders back)

muscle name & action

Psoas Major - flexes hip (as in lifting leg to place on stair)

muscle name & action

Rectus Abdominis - compresses abdomen, flexes vertebral column

muscle name & action

Serratus Anterior - protracts scapula (which pushes the arm forward in front of the scapula, as in punching or hugging)

muscle name & action

Diaphragm - drops down to enlarge thoracic cavity, causing inspiration

muscle name & action

Rectus Femoris- Extends knee, flexes hip (kicking a ball)

muscle name & action

Vastus Lateralis - Extends knee

muscle name & action

Vastus Intermedius - Extends knee

muscle name & action

Vastus Medialis - Extends knee

muscle name & action

Adductor Longus - Flexes hip, adducts leg

muscle name & action

Adductor Magnus - Extends hip, adducts leg

muscle name & action

Biceps Femoris - Extends hip, flexes knee

muscle name & action

Semimembranosus - Extends hip, flexes knee

muscle name & action

Semitendinosus - Extends hip, flexes knee

muscle name & action

Extends hip (as in pushing down while climbing a stair), rotates leg laterally

muscle name & action

Tensor Fascia Latae - abducts leg at hip

muscle name & action

Gluteus Medius - Abduct leg at hip

muscle name & action

Gracilis - Adducts leg at hip, flexes knee

muscle name & action

sartorius - hip and knee flexion

muscle name & action

Gastrocnemius - Plantar flexion at ankle, flexes knee

muscle name & action

Soleus - Plantar flexion at ankle

muscle name & action

Tibialis Anterior - Dorsiflexion & inversion at ankle

muscle name & action

Fibularis (Peroneus) Longus - Eversion at ankle