Skeletal Muscles Flashcards
Frontal muscle
Function: Raises eyebrow
Insertion: Skin of eyebrows
Origin: Occipital bone
Orbicularis oculi
Function: Closes eye
Insertion: Maxilla and frontal bone
Origin: Maxilla and frontal bone (encircles eye)
Orbicularis oris
Function: Draw lips together
Insertion: Encircles lips
Origin: Encircles lips
Zygomaticus
Function: Elevates corner of mouth and lips
Insertion: Angle of mouth and upper lip
Origin: Zygomatic
Masseter
Function: Closes jaw
Insertion: Mandible
Origin: Zygomatic arc
Temporal
Function: Closes Jaw
Oriign: Temporal region of skull
Insertion: Mandible
Sternocleidomastoid
Function: Rotates and flexes head and neck
Insertion: Mastoid process
Origin: Sternum and clavicle
Trapezius
Function: Extends head and neck
Insertion: Scapula
Origin: Skull and upper vertebrae
Pectoralis major
Function: Flexes and helps adduct upper arm
Insertion: Humerus
Origin: Sternum, clavicles, upper rib cartialige
Latissimus dorsi
Function: Extends and helps adduct upper arm
Insertion: Humerus
Origin: Vertebrae and illium
Deltoid
Function: Abducts upper arm
Insertion: Humerus
Origin: Clavicle and scapula
Biceps brachii
Function: Flexes elbow
Insertion: Radius
Origin: Scapula
Triceps brachii
Function: Extends elbow
Insertion: Ulna
Origin: Scapula and humerus
External oblique
Function: Compresses abdomen
Insertion: Midline of abdomen
Origin: Low thoracic cage
Internal oblique
Function: Compresses abdomen
Insertion: MIdline of abdomen
Origin: Pelvis
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)
