Skeletal Muscles Flashcards by Unknown Unknown

Frontal muscle

Function: Raises eyebrow
Insertion: Skin of eyebrows
Origin: Occipital bone

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Orbicularis oculi

Function: Closes eye
Insertion: Maxilla and frontal bone
Origin: Maxilla and frontal bone (encircles eye)

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Orbicularis oris

Function: Draw lips together
Insertion: Encircles lips
Origin: Encircles lips

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Zygomaticus

Function: Elevates corner of mouth and lips
Insertion: Angle of mouth and upper lip
Origin: Zygomatic

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Masseter

Function: Closes jaw
Insertion: Mandible
Origin: Zygomatic arc

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Temporal

Function: Closes Jaw
Oriign: Temporal region of skull
Insertion: Mandible

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Sternocleidomastoid

Function: Rotates and flexes head and neck
Insertion: Mastoid process
Origin: Sternum and clavicle

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Trapezius

Function: Extends head and neck
Insertion: Scapula
Origin: Skull and upper vertebrae

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Pectoralis major

Function: Flexes and helps adduct upper arm
Insertion: Humerus
Origin: Sternum, clavicles, upper rib cartialige

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Latissimus dorsi

Function: Extends and helps adduct upper arm
Insertion: Humerus
Origin: Vertebrae and illium

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Deltoid

Function: Abducts upper arm
Insertion: Humerus
Origin: Clavicle and scapula

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Biceps brachii

Function: Flexes elbow
Insertion: Radius
Origin: Scapula

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Triceps brachii

Function: Extends elbow
Insertion: Ulna
Origin: Scapula and humerus

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External oblique

Function: Compresses abdomen
Insertion: Midline of abdomen
Origin: Low thoracic cage

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Internal oblique

Function: Compresses abdomen
Insertion: MIdline of abdomen
Origin: Pelvis

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Transversus abdominis

Function: Compresses abdomen
Insertion: Midline of abdomen
Origin: Ribs, vertebrae, pelvis

Rectus abdomins

Function: Flexes trunk
Insertion: Lower rib cage
Origin: Pubis

Illiopsoas

Function: Flexes thigh or trunk
Insertion: Femur
Origin: Illium and vertebrae

Sartorius

Function: Flexes thigh and rotates lower leg
Insertion: Tibia
Origin: Illium

Gluteus maximus

Function: Extends thigh
Insertion: Femur
Origin: Illium, sacrum, coccyx

Adductor group

Adductor longus, gracilis, pectineus

Adductor longus

Function: Adducts thighs
Insertion: Femur
Origin: pubis

Gracilis

Function: Adducts thigh
Insertion: Tibia
Origin: Pubis

Pectineus

Function: Adducts thigh
Insertion: Femur
Origin: Pubis

Hamstring group

Semimembranosus, semitendinosus, biceps femoris

Semimembranosus

Function: Flexes knee Insertion: Tibia Origin: Ischium

Semitendinosus

Function: Flexes knee Insertion: Tibia Origin: Ischium

Biceps femoris

Function: Flexes knee Insertion: Fibula Origin: Ischium and femur

Quadriceps group

Rectus femoris, vastus lateralis, intermedius and medallus, tibalism anterior, gastrocnemius, soleus

Rectus femoris

Function: Extends knee Insertion: Tibia Oriign: Illium

Vastus lateralis, intermedius, and medalis

Function: Extend knee Insertion: Tibia Origin: Femur

Tibialis anterior

Function: Dorsiflexes ankle Insertion: Metatarsals Origin: Tibia`

Gasreocnemius

Function: PLantar flexes ankle Insertion: Calcaneus o heel Origin: Femur

Soleus

Function: Plantar flexes ankle Insertion: Calcaneus or heel Origin: Tibia and fibula

Peroneus group

Peroneus longus and brevis

Peroneus longus and brevus

Function: Planrar flex ankle Insertion: Tarsals and metatarsals Origin: Tibia and fibula

Flexors

Pectoralis major (upper arm), biceps brachii (lower arm), Illiopsoas, sartorius, rectus femoris (Thigh), Hamstrings (lower legs), tibialis anterior (foot)

Extensors

Latissimus dorsi (upper arm), triceps brachii (Lower arm), Gluteus maximus and hamstrings (thigh), quadricep groupd (lower leg), gastrocnemius and soleus (foot)

Abductors

Deltoid (opper arm)l gluteus maximus (thight), Peroneus lingus (foot)