Bio 234 Lab Muscle Function Flashcards

Flashcards for vocabulary review of muscle functions.

Occipitofrontalis

Raises eyebrows; wrinkles brow

Orbicularis oris

Pucker lips

Orbicularis oculi

Squinting of eyes

Zygomaticus

“Smile” raises corner of lips

Levator labii superioris

Raises upper lip

Depressor labii inferioris

Depresses lower lip

Depressor anguli oris

Frown

Nasalis

Wrinkles nose

Buccinators

Compresses cheeks

Temporalis

Closes mouth

Masseter

Closes mouth

Sternocleidomastoid (SCM)

Bilateral contraction – head flexion; Unilateral – contralateral head rotation

Scalenes (Anterior, middle & posterior)

Bilateral – flexion; Unilateral – lateral flexion

Infrahyoid muscles

Lowers hyoid/stabilizes hyoid

Suprahyoid muscles

Depresses mandible (opens mouth)/raises hyoid

Pectoralis major

Adduction, horizontal adduction, flexion, medial rotation of the shoulder

Pectoralis minor

Scapula protraction, downward rotation

Serratus Anterior

Protraction of scapula

Rectus abdominus

Flexion of spine/torso

External oblique

Increases abdominal pressure/stabilize spine

Internal oblique

Increases abdominal pressure/stabilize spine

Transverse abdominus

Increases abdominal pressure/stabilize spine

Trapezius

Upper Traps: Elevation and upward rotation of the scapula; Middle Traps: Adduction of the scapula; Lower Traps: Depression and upward rotation of the scapula

Splenius capitis

Bilateral -extends neck/head; Unilateral – ipsilateral rotation

Supraspinatus

Abduction of the humerus

Infraspinatus

External rotation of the humerus

Teres minor

External rotation and horizontal abduction of the humerus

Teres major

Extension, medial rotation and adduction of the humerus

Subscapularis

Internal rotation of the humerus

Rhomboideus (Major & Minor)

Scapula adduction and downward rotation

Levator scapulae

Elevates scapulae

Deltoid

Anterior Deltoid: Flexion and medial rotation of the humerus; Middle Deltoid: Abduction of the humerus; Posterior Deltoid: Extension and lateral rotation of the humerus

Lattisimus dorsi

Adduction, extension and medial rotation of the humerus

Erector Spinae Group

Extends vertebral column

Rotator cuff muscles

Supraspinatus, Infraspinatus, Teres minor, Subscapularis

Biceps brachii

Flexion of the elbow, supination of the forearm

Bracialis

Flexion of the elbow

Brachioradialis

Flexion of the forearm

Triceps brachii (long, lateral, & medial head)

Elbow extension

Coracobrachialis

Flexion and adduction of the humerus

Flexor carpi radialis

Flexion and radial deviation of the wrist

Flexor carpi ulnaris

Flexion and ulnar deviation of the wrist

Palmaris longus

Flexion of the wrist

Flexor digitorum superficialis

Flexes fingers

Pronator teres

Pronates forearm

Extensor carpi radialis (longus & Brevis)

Extension and radial deviation of the wrist

Extensor carpi ulnaris

Extension and ulnar deviation of the wrist

Extensor digiti minimi

Extends little finger

Extensor digitorum

Extension of the 2nd through 5th digits and wrist

Iliopsoas

Hip flexion

Sartorius

Flexion, external rotation and abduction at the hip, flexion of the knee

Rectus femoris

Extension of the knee and flexion of the hip

Vastus medialis

Extension of the knee

Vastus lateralis

Extension of the knee

Vastus intermedialis

Extension of the knee

Gracilis

Adduction, flexion and internal rotation of the hip

Adductor magnus

Adduction, flexion and internal rotation of the hip

Adductor longus

Adduction, flexion and internal rotation of the hip

Biceps femoris (short and long head)

Flexion at the knee

Semitendinosus

Extension of the hip, flexion at the knee

Semimembranosus

Extension of the hip, flexion at the knee

Gastrocnemius

Plantar flexion and flexion at knee

Soleus

Plantar flexion

Popliteus

Knee flexion

Flexor hallucis longus

Flexion of all the joints of the hallux

Flexor digitorum longus

Flexion of digits 2-5 in the foot.

Tibialis posterior

Plantar flexion, inversion of the foot

Fibularis (longus & brevis)

Plantarflexion and eversion of the foot

Tibialis Anterior

Dorsiflexion and inversion of the foot

Extensor digitorum longus

Extension of digits 2-5 in the foot

Extensor hallucis longus

Extension of all the joints of the hallux

Gluteus maximus

Extension and lateral rotation of the femur

Tensor fasciae latae (TFL)

Flexion, abduction and internal rotation of the femur

Gluteus medius

Abduction and internal rotation of the femur

Piriformis

External rotation of the femur

Quadriceps muscle group

Rectus femoris, Vastus medialis, Vastus lateralis, Vastus intermedialis

Hamstring muscle group

Semitendinosus, Semimembranosus, Biceps femoris (short and long head)

Occipitofrontalis

Raises eyebrows; wrinkles brow

Orbicularis oris

Pucker lips

Orbicularis oculi

Squinting of eyes

Zygomaticus

“Smile” raises corner of lips

Levator labii superioris

Raises upper lip

Depressor labii inferioris

Depresses lower lip

Depressor anguli oris

Frown

Nasalis

Wrinkles nose

Buccinators

Compresses cheeks

Temporalis

Closes mouth

Masseter

Closes mouth

Sternocleidomastoid (SCM)

Bilateral contraction – head flexion; Unilateral – contralateral head rotation

Scalenes (Anterior, middle & posterior)

Bilateral – flexion; Unilateral – lateral flexion

Infrahyoid muscles

Lowers hyoid/stabilizes hyoid

Suprahyoid muscles

Depresses mandible (opens mouth)/raises hyoid

Pectoralis major

Adduction, horizontal adduction, flexion, medial rotation of the shoulder

Pectoralis minor

Scapula protraction, downward rotation

Serratus Anterior

Protraction of scapula

Rectus abdominus

Flexion of spine/torso

External oblique

Increases abdominal pressure/stabilize spine

Internal oblique

Increases abdominal pressure/stabilize spine

Transverse abdominus

Increases abdominal pressure/stabilize spine

Trapezius

Upper Traps: Elevation and upward rotation of the scapula; Middle Traps: Adduction of the scapula; Lower Traps: Depression and upward rotation of the scapula