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AP1Muscles
Muscles
57
Anatomy
Undergraduate 2
03/28/2010

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Term
Frontalis
Definition
O-cranial aponeurosis/I-skin of eyebrows/A-raises eyebrows
Term
Occipitalis
Definition
O-occiput bone/I-cranial aponeurosis/A-fixes and pulls scalp posteriorly
Term
Orbicularis Oculi
Definition
O-frontal bone and maxilla/I-Tissue around eyelids/A-blinks, closes eyes, squinting
Term
Orbicularis Oris
Definition
O-Mandible & Maxilla/I-skin & muscle around mouth/A-closes and protrudes mouth, kissing & whistling
Term
Buccinator
Definition
O-molar region mandible & maxilla/I-into orbiculars oris/A-flattens cheeks against teeth
Term
Temporalis
Definition
O-temporal fossa/I-coronoid process mandible/A-closes jaw
Term
Zygomaticus Major & Minor
Definition
O-zygomatic bone/I-skin & muscle at corner of lips/A-raises corner of mouth/smiling muscle
Term
Masseter
Definition
O-temporal process/I-Angle & ramus of mandible/A-closes jaw
Term
Sternocleidomastoid
Definition
O-manubrium/medial portion of clavicle/I-mastoid process/A-flexes neck, rotates head
Term
Platysma
Definition
O-fascia of chest over pectoral muscles & deltoid muscle)/I-lower margin mandible, skin, muscle @ corner of mouth/A-depresses mandible, produces downward sag of mouth
Term
Sternohyoid
Definition
O-posterior manubrium/I-lower margin hyoid bone/A-depresses larynx & depresses hyoid bone
Term
Pectoralis Major
Definition
O-medial 1/3 of clavicle, sternum, cartilage of ribs 1-6, aponeurosis of external obliques/I-greater tubercle of humerus/A-adducts arm @ shoulder
Term
Deltoid
Definition
O-lateral 1/3 of clavicle, acromion, spine of scapula/I-deltoid tuberosity/A-prime mover of arm abduction
Term
External intercostals
Definition
pulls ribs toward one another to elevate rib cage; aids in inspiration
Term
Rectus Abdominis
Definition
O-pubic crest, pubic symphysis/I-xiphoid process, costal cartilage of ribs 5-7/I-flexes vertebral column/Comments: medial superficial muscle, ensheathed by aponeurosis of obliques; segmented
Term
External Obliques
Definition
most superficial lateral muscle; fibers run downward and medially; ensheathed by aponeurosis
Term
Internal Oblique
Definition
most fibers run at right angles to those of external obliques; underlies external obliques
Term
Transversus Abdominis
Definition
deepest muscle at abdominal wall; fibers run horizontally
Term
Trapezius
Definition
superficial muscle; triangular in shape; from neck all down thru thoracic vertebrae for elevation
Term
Latissimus Dorsi
Definition
O-spinous processes of lower 6T and all L vertebrae, last 3-4 ribs, iliac crest/I-intertubercular groove/A-adducts arm
Term
Infraspinatus
Definition
rotator cuff muscle
Term
Teres Minor
Definition
Rotator Cuff muscle
Term
Teres Major
Definition
rotator cuff muscle, immediately lateral to teres minor
Term
Supraspinatus
Definition
rotator cuff muscle
Term
Triceps Brachii
Definition
O-LH-inferior margin of glenoid rim, Lat-Med Heads-posterior humerus/I-olecranon process of ulna/A-powerful forearm extensor
Term
Biceps Brachii
Definition
O-SH-coracoid process, LH-superior glenoid rim/I-radial tuberosity/A-flexion of elbow
Term
Brachioradialis
Definition
forms lateral boundary of antecubital fossa/synergist in forearm flexion
Term
Brachialis
Definition
immediately deep to biceps brachii/major flexor of forearm
Term
Pronator Teres
Definition
O-medial epicondyle of humerus, coronoid process of ulna/I-midshaft of radius/A-pronate forearm, antagonist to supinator
Term
Flexor Carpi Radialis
Definition
O-medial epicondyle of humerus/I-base metacarpals 2 & 3/A-powerful flexor of wrist, abducts hand
Term
Palmaris Longus
Definition
O-medial epicondyle of humerus/I-palmar aponeurosis/A-flexes wrist weakly
Term
Flexor Carpi Ulnaris
Definition
O-medial epicondyle of humerus, olecranon process, posterior surface of ulna/I-base metacarpal 5/A-powerful flexor of wrist, adducts hand
Term
Flexor Digitorum Superficialis
Definition
O-medial epicondyle of humerus/I-middle phalanges 2-5/A-flexes wrist and middle phalanges 2-5
Term
Flexor Digitorum Profundus
Definition
O-anteromedial surface of ulna, interosseous membrane, coronoid process/I-distal phalanges 2-5/A-sole muscle that flexes distal phalanges; assists in wrist flexion
Term
Extensor Carpi Radialis (Longus & Brevis)
Definition
O-Lateral supracondylar ridge of humerus & lateral epicondyle of humerus/I-base of metacarpals 2 & 3/A-extends and abducts wrist
Term
Extensor Digitorum
Definition
O-lateral epicondyle of humerus/I-distal phalanges 2-5/A-prime mover of finger extension, extends wrist
Term
Extensor Carpi Ulnaris
Definition
O-Lateral epicondyle of humerus, posterior border of ulna/I-base of metacarpal 5/A-extends and adducts wrist
Term
Supinator
Definition
O-lateral epicondyle of humerus, proximal ulna/I-proximal end of radius/A-supinate forearm
Term
Iliopsoas
Definition
consists of iliacus and psoas major
Term
Sartorius
Definition
longest muscle in human body
Term
Adductors (Longus, magnus, brevis)
Definition
O-boyd of pubis, ischial and pubic rami/I-linea aspera/A-adducts thigh
Term
Gracilis
Definition
straplike superficial muscle of medial thigh
Term
Quadriceps Femoris
Definition
group of 4 muscles consisting of rectus femoris, vastus lateralis, vastus medialis, vastus intermedius
Term
Rectus Femoris
Definition
O-anterior inferior iliac spine, superior margin of acetabulum/I-tibial tuberosity/A-extends knee & flexes thigh @ hip/superficial muscle of thigh, runs straight down, only muscle of group to cross hip joint
Term
Vastus lateralis
Definition
forms lateral aspect of thigh
Term
Vastus medialis
Definition
forms inferomedial aspect of thigh
Term
Vastus intermedius
Definition
obscured by rectus femoris; lies between vastus lateralis and vastus medialis on anterior thigh
Term
Gluteus Medius
Definition
O-upper lateral surface of ilium/I-greater trochanter of femus/A-abducts thigh
Term
Hamstrings
Definition
group of muscles consisting of biceps femoris, semitendinosus & semimembranosus
Term
Biceps Femoris
Definition
O-LH-ischial tuberosity, SH- linea aspera and distal femus/I-head of fibula and lateral condyle of tibia/A-extends thigh, flexes knee/most lateral muscle of group; arises from 2 heads
Term
Semitendinosus
Definition
medial to biceps femoris
Term
Semimembranosus
Definition
deep to semitendinosus
Term
Fibularis Longus (Peroneus)
Definition
superficial lateral muscle overlies fibula
Term
Tibialis Anterior
Definition
O-lateral condyle of tibia, upper 2/3 of tibia/I-Tarsal 1, metatarsal 1/A-prime mover of dorsiflexion; inverts food
Term
Triceps Surae
Definition
muscle pair that shapes posterior calf; gastrocnemius and soleus
Term
Gastrocnemius
Definition
O-medial and lateral condyles of femus/I-calcaneus via calcaneus tendon/A-plantar flexes foot, crosses knee joint=flexes knee
Term
Soleus
Definition
lies immediately deep to gastrocnemius; looks like "sole" fish
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