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Muscles
All the muscles for test 2
49
Anatomy
Undergraduate 2
06/30/2014

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Term
Epicranius (frontal belly)
FACIAL EXPRESSIONS
Definition
0rigin- epicranial aponeurosis
Insertion- skin of eyebrows and base of nose
Action- raises eyebrows; wrinkles forehead horizontally
Antagonists- brow depressors
Term
Epicranius (occipital belly)
FACIAL EXPRESSIONS
Definition
O- occipital and temporal bones
I- epicranial aponeurosis
Ac- pulls scalp posteriorly
An- none
Term
Corrugator supercilii
FACIAL EXPRESSIONS
Definition
O- frontal bone above nasal bone
I- skin of eyebrow
Ac- draws eyebrows together and inferiorly; wrinkles forehead vertically (frowning)
Term
Orbicularis Oculi
FACIAL EXPRESSIONS
Definition
O- frontal and maxillary bones; ligaments around orbit
I- tissue of eyelids
Ac- closes eye (blinking, squinting, and winking)
Term
Zygomaticus (major and minor)
FACIAL EXPRESSIONS
Definition
O- Zygomatic bone
I- skin and muscle at corner of mouth
Ac- raises corners of mouth upward (smiling)
An- orbicularis oris
Term
Risorius
FACIAL EXPRESSIONS
Definition
O- fascia associated with masseter muscle
I-skin at corner of mouth
Ac- draws corner of lip laterally (tenses lips)
An- Orbicularis oris
Term
Orbicularis Oris
FACIAL EXPRESSIONS
Definition
O-Maxilla and mandible
I- skin and muscle of mouth
Ac- closes and protrudes lips (kissing and whistling)
An- risorius and zygomaticus
Term
Buccinator
FACIAL EXPRESSIONS
Definition
O- maxilla and mandible
I- Orbicularis Oris
Ac- compresses cheeks (whistling/sucking); holds food between teeth while chewing
An- Orbicularis oris
Term
Platysma
FACIAL EXPRESSIONS
Definition
O- fascia of chest
I- mandible; skin and muscle at corner of mouth
Ac- tenses skin of neck (shaving);pulls lower lip back and down
An- risorius and zygomaticus
Term
Masseter
MASTICATION
Definition
O- Zygomatic arch and zygomatic bone
I- mandible
Ac- prime mover of jaw closure (elevates mandible)
An- all suprahyoid muscles
Term
Temporalis
MASTICATION
Definition
O- temporal bone
I- mandible
Ac- closes jaw (elevates and retracts mandible)
An- all suprahyoid muscles
Term
Sternocleidomastoid
HEAD MOVEMENT AND TRUNK EXTENSION
Definition
O- manubrium of sternum and clavicle
I- mastoid process of temporal bone
Ac-(bilaterally)flexes head foreward (unilaterally) rotates chin toward shoulder on opposite side
An- trapezius
Term
External Intercostals
BREATHING
Definition
O- inferior border of rib above
I- superior border of rib below
Ac- elevate rib cage (forced inspiration) synergists of diaphragm
An- internal intercostals
Term
Internal Intercostals
BREATHING
Definition
O- superior border of rib below
I- inferior border of rib above
Ac- depress rib cage (forced expiration)
An-external intercostals
Term
Diaphragm
BREATHING
Definition
O- inferior, internal surface of rib cage and sternum, costal cartilages of ribs 6-12 and lumbar vertebrae
I- central tendon
Ac- prime mover of inspiration (flattens on contraction); increases intra-abdominal pressure
Term
Rectus Abdominis
TRUNK MOVEMENT AND COMPRESSION OF ABDOMINAL VISCERA
Definition
O- pubic crest and symphysis
I- xiphoid process, costal cartilages of ribs 5-7
Ac- flexes and rotates lumbar region of vertebral column; compresses abdomen (sit-ups)
Term
External Oblique
TRUNK MOVEMENT AND COMPRESSION OF ABDOMINAL VISCERA
Definition
O- 5th-12th ribs
I- Linea alba, pubic crest and iliac crest
Ac- (bilateral) same as rectus abdominis (unilateral)trunk rotation and lateral flexion
Term
Internal Oblique
TRUNK MOVEMENT AND COMPRESSION OF ABDOMINAL VISCERA
Definition
O- lumbar fascia and iliac crest
I- linea alba and 10th -12th ribs
Ac- (bilateral) same as rectus abdominis (unilateral)trunk rotation and lateral flexion
Term
Transversus Abdominis
TRUNK MOVEMENT AND COMPRESSION OF ABDOMINAL VISCERA
Definition
O- 7th-12th ribs, lumbar fascia and iliac crest
I- linea alba and pubic crest
Ac- compresses abdomen
Term
Pectoralis Minor
Definition
O- 3rd-5th ribs
I- coracoid process of scapula
Ac- with ribs fixed- pulls scapula forward and inferiorly; with scapula fixed- elevates rib cage
Term
Serratus Anterior
Definition
O- 1st-9th ribs
I- medial border of scapula
Ac- rotates scapula so that its inferior angle moves laterally and upward; important in abducting and raising arm, and in horizontal movements of arm (pushing and punching)
An- Trapezius and Latissimus Dorsi
Term
Pectoralis Major
Definition
O- clavicle, sternum and aponeurosis of external oblique muscle
I- greater tubercle of humerus
Ac- prime mover of arm flexion; adducts and medially rotates arm
An- deltoid
Term
Trapezius
Definition
O- occipital bone; spines of all thoracic vertebrae
I- acromion and spine of scapula; clavicle
Ac- extends head; elevates scapula (shrugging shoulders); adducts scapula
An- Serratus Anterior
Term
Rhomboids
Definition
O- spines of T2-T5 vertebrae
I- medial border of scapula
Ac-adducts scapula
An-Serratus Anterior
Term
Latissimus Dorsi
Definition
O- spines of thoracic and lumbar vertebrae; iliac crest
I- humerus
Ac-prime mover of arm extension (brings arm down in power stroke); adducts arm
An- deltoid and serratus anterior
Term
Teres Major
Definition
O- scapula at inferior angle
I- greater tubercle of humerus
Ac- rotates humerus laterally; stabilizes shoulder joint
Term
Deltoid
Definition
O- clavicle; spine and acromion of scapula
I- deltoid tuberosity of humerus
Ac-prime mover of arm abduction; active during walking arm-swinging movements
An- Latissimus dorsi and pectoralis major
Term
Biceps Brachii
Definition
O- coracoid process and glenoid cavity
I- radial tuberosity
Ac- prime mover of forearm flexion
An- Triceps Brachii
Term
Brachialis
Definition
O- humerus
I- ulna
Ac- flexes forearm ( lifts ulna as biceps lifts radius)
An-Triceps Brachii
Term
Brachioradialis
Definition
O- humerus
I- styloid process of radius
Ac- synergist in forearm flexion
An-Triceps Brachii
Term
Triceps Brachii
Definition
O-scapula and humerus
I- olecranon of ulna
Ac- prime mover of forearm extension
An- Brachialis, biceps brac, and brachioradialis
Term
Gracilis
Definition
O- pubis
I-medial aspect of tibia
Ac- adduct thigh
An- tensor fasciae latae
Term
Sartorius
Definition
O- ilium
I- medial aspect of tibia
Ac- crosses legs (tailor's muscle)
Term
Rectus Femoris (MAKES UP QUADRICEPS FEMORIS)
Definition
O- ilium and acetabulum
I- patella and tibial tuberosity
Ac- flexes thigh at hip; extends knee
An- Gluteus Maximus and hamstrings (biceps femoris, semimembranosus, and semitendinosus)
Term
Vastus Lateralis
Definition
O- greater trochanter of femor
I- patella and tibial tuberosity
Ac- extends knees
An- hamstrings(biceps femoris, semimembranosus, and semitendinosus)
Term
Vastus Medialis
Definition
O-linea aspera of femur
I-patella and tibial tuberosity
Ac- extends knee
An- Hamstring (biceps femoris, semimembranosus, and semitendinosus
Term
Vastus Intermedius
Definition
O- femur
I- tibial tuberosity
Ac- extends knee
An-hamstring (biceps femoris, semimembranosus, and semitendinosus
Term
Tensor Fasciae Latae
Definition
O- iliac crest
I-Iliotibial tract
Ac- makes iliotibial tract tout, flexes and abducts thigh at hip; rotates thigh medially
An- biceps femoris and gracilis
Term
Gluteus Maximus
Definition
O-ilium, sacrum, coccyx
I- femur and iliotibial tract
Ac- major extensor of thigh (climbing stairs)
An-rectus femoris
Term
Gluteus Medius
Definition
O-ilium
I- greater trochanter of femur
Ac-abducts and medially rotates thigh
Term
Gluteus Minimus
Definition
O-ilium
I-greater trochanter of femur
Ac- abducts and medially rotates thigh
Term
Biceps Femoris
Definition
O-ischial tuberosity; linea aspera of femur
I- proximal ends of tibia and fibula
Ac- extends thigh; flexes knee
An- Quadriceps (rectus femoris, vastus lateralis, vastus medialis and vastus intermedius
Term
Semitendinosus
Definition
O- ischial tuberosity
I- medial aspect of tibia
Ac- extends thigh; flexes knee
An- Quadriceps (rectus femoris, vastus lateralis, vastus medialis and vastus intermedius
Term
Semimembranosus
Definition
O- ischial tuberosity
I- medial aspect of tibia
Ac- extends thigh; flexes knee
An- Quadriceps (rectus femoris, vastus lateralis, vastus medialis and vastus intermedius
Term
Tibialis anterior
Definition
O-proximal tibia
I- 1st metatarsal
Ac- prime mover of dorsiflexion; inverts foot
An- Gastrocnemius and soleus
Term
Extensor Digitorum Longus
Definition
O- proximal tibia and fibula
I- phalanges
Ac- prime mover of toe extensions; dorsiflexes foot
An- Gastrocnemius and soleus
Term
Fibularis Longus
Definition
O- proximal fibula
I- 1st metatarsal
Ac- plantar flexes and everts foot
An- tibialis anterior
Term
Triceps Surae (Gastrocnemius)
Definition
O-Lateral and medial condyles of femur
I- calcaneus via calcaneal tendon
Ac- plantar flexes foot when knee is extended; flexes knee when foot is dorsiflexed
An- tibialis anterior; rectus femoris; and hamstrings
Term
Triceps Surae (soleus)
Definition
O- proximal tibia and fibula
I- calcaneue via calcaneal tendon
Ac- plantar flexes foot
An- Tibialis Anterior
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