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A&P I > Individual Skeletal Muscles > Flashcards

Individual Skeletal Muscles Flashcards

0
Q

Temporalis

A

Origin: temporal bone
Insertion: coronoid process and ramus of mandible
Action: elevates and retracts mandible

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1
Q

Orbicularis oculi

A

Origin: medial wall of orbit
Insertion: circular path around orbit
Action: closes eye

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2
Q

Masseter

A

Origin: maxilla and zygomatic arch
Insertion: angle and ramus of mandible
Action: elevates mandible

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3
Q

Buccinator

A

Origin:alveolar processes of maxilla and mandible and pterygomandibular raphe
Insertion: orbicularis oris
Action: presses cheeks against teeth, draws corner of mouth laterally, assists in mastication

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4
Q

Zygomaticus major

A

Origin: zygomatic bone
Insertion: skin at angle of mouth and orbicularis oris
Action: draws angle of mouth superior and lateral, smiling

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5
Q

Zygomaticus minor

A

Origin: zygomatic bone
Insertion: upper lip
Action: raises upper lip exposing upper teeth

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6
Q

Orbicularis oris

A

Origin: muscle fibers surrounding opening of mouth
Insertion: skin at corner of mouth
Action: closes and protrudes lip kissing, compresses lip against teeth, shapes lips during speech

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7
Q

Sternocleidomastoid

A

Origin: sternal head, manubrium, clavicular head, medial clavicle
Insertion: mastoid process of temporal, lateral superior nuchal line of occipital
Action: bilaterally flex cervical portion of neck, extend head at joint. Unilaterally laterally flex head and neck to side and rotate

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8
Q

Platysma

A

Origin: facia over deltoid and pectoralis major muscles
Insertion: mandible
Action: tenses skin of neck, draws outer part of lower lip inferior and posterior as in pout, depresses mandible

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9
Q

Trapezius

A

Origin: superior nuchal line of occipital and c7 to t12
Insertion: clavicle and acromion and spine of scapula
Action: upward rotate scapula, adduct scapula, stabilize scapula

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10
Q

Deltoid

A

Origin: acromial of clavicle and scapula, spine of scapula
Insertion: deltoid tuberosity of humerus
Action: abduct arm, flex and medially rotate arm, extend and laterally rotate arm

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11
Q

Supraspinatus

A

Origin: supraspinous fossa of scapula
Insertion: greater tubercle of humerus
Action: assist deltoid in abducting arm

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12
Q

Infraspinatus

A

Origin: infraspinous fossa of scapula
Insertion: greater tubercle of humerus
Action: laterally rotate arm

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13
Q

Teres major

A

Origin: inferior angle of scapula
Insertion: medial lip of intertubercular sulcus of humerus
Action: extend arm, assist in adduction and medial rotation of arm

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14
Q

Teres minor

A

Origin: inferior lateral border of scapula
Insertion: greater tubercle of humerus
Action: laterally rotate and extend arm

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15
Q

Rhomboid major, minor

A

Origin: major t2 to t5, minor c7 to t1
Insertion: vertical border of scapula inferior to spine
Action: stabilize scapula, elevates and adducts scapula and rotates down

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16
Q

Latissimus dorsi

A

Origin: t7 to l5, sacrum, ilium, ribs 9-12
Insertion:intertubercular sulcus of humerus
Action: extends, adducts, medially rotates arm, draws arm inferior and posterior

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17
Q

Triceps brachii

A

Origin: scapula, humerus, humerus
Insertion: olecranon
Action: extends forearm at elbow, arm

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18
Q

Biceps brachii

A

Origin: scapula above glenoid, coracoid process of scapula
Insertion: radial tuberosity, bicipital aponeurosis
Action: flexes forearm, supinates forearm, flexes arm

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19
Q

Brachialis

A

Origin: distal anterior humerus
Insertion: ulnar tuberosity and coronoid process of ulna
Action: flexes forearm

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20
Q

Brachioradialis

A

Origin: lateral distal humerus
Insertion: superior to styloid process of radius
Action: flexes forearm, supinates and pronates forearm to neutral

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21
Q

Flexor retinaculum

A

Thick deep fascia at palm side of wrist. Hold in flexor tendons, median nerve.

22
Q

Pectoralis major

A

Origin: clavicle, sternum, costal cartilages 2-6
Insertion: humerus
Action: flex, adducts, and medially rotates arm (whole), extends flexed arm to side of trunk

23
Q

Pectoralis minor

A

Origin: ribs 2-5
Insertion: coracoid process of scapula
Action: abducts scapula and rotates down

24
Q

Serratus anterior

A

Origin: ribs 1-9
Insertion: vertebral border, scapula
Action: abducts/protracts scapula and rotates up. Boxers muscle

25
Q

Intercostals

A

Origin: internal lower rib, external upper rib
Insertion: upper rib, lower rib
Action: exhalation, inhalation

26
Q

transversus abdominis

A

Origin: iliac crest, inguinal ligament, lumbar fascia, ribs 5-10
Insertion: xiphoid process, linea alba, pubis
Action: compresses abdomen

27
Q

external oblique

A

Origin: ribs 5-12
Insertion: iliac crest and linea alba
Action: bilaterally compress abdomen, unilaterally laterally flex and rotate vertebral column

27
Q

Rectus abdominis

A

Origin: pubic crest and pubic symphysis
Insertion: cartilage of ribs 5-12, xiphoid process
Action: flex vertebrae column, compresses abdomen to aid in pee, defecate, forced exhale, childbirth

27
Q

Diaphragm

A

Origin: xiphoid process, costal cartilages and ribs 7-12, lumbar vertebrae
Insertion: central tendon
Action: inhalation, exhalation

28
Q

Internal oblique

A

Origin: iliac crest, inguinal ligament
Insertion: linea alba, cartilage of ribs 5-12
Action: compress abdomen, laterally flex and rotate vertebral column

29
Q

Gluteus medius

A

Origin: ilium
Insertion: greater trochanter of femur
Action: abducts thigh, medially rotates thigh

30
Q

Gluteus maximus

A

Origin: iliac crest, sacrum, coccyx, aponeurosis of sacrospinalis
Insertion: iliotibial tract, gluteal tuberosity under greater trochanter
Action: extends thigh, laterally rotates thigh, helps lock knee

31
Q

Sartorius

A

Origin: anterior superior iliac spine
Insertion: medial tibia
Action: weakly flexes leg at knee, weakly abducts, flexes, laterally rotates thigh at hip

32
Q

Adductor longus

A

Origin: pubic crest and pubic symphysis
Insertion: linea aspera of femur
Action: adducts and flexes thigh, medially rotates thigh

33
Q

Gracilis

A

Origin: pubis
Insertion: tibia
Action: adducts thigh, medially rotates thigh, flexes leg at knee

36
Q

Calcaneal (achilles) tendon

A

Origin: soleus and gastrocnemius
Insertion: calcaneus
Action: plantar flex

37
Q

Gastrocnemius

A

Origin: lateral and medial condyles of femur, capsule of knee
Insertion: calcaneus
Action: plantar flexes foot, flexes leg at knee

38
Q

Soleus

A

Origin: head of fibula, medial tibia
Insertion: calcaneus
Action: plantar flexes foot

39
Q

Tibialis anterior

A

Origin: lateral condyle and body of tibia, interosseous membrane
Insertion: metatarsal 1 and first cuneiform
Action: dorsiflexes foot and supinates foot

40
Q

Rectus femoris

A

Origin: anterior inferior iliac spine
Insertion: patella then tibial tuberosity
Action: extend leg at knee, flex thigh at hip

40
Q

Vastus lateralis

A

Origin: greater trochanter of femur
Insertion: patella then tibial tuberosity
Action: extend leg at knee

41
Q

Quadriceps femoris (4x)

A

Rectus femoris
Vastus lateralis
Vastus intermedius
Vastus medialis

42
Q

Vastus medialis

A

Origin: linea aspera of femur
Insertion: patella then tibial tuberosity
Action: extend leg at knee

44
Q

Vastus intermedius

A

Origin: anterior and lateral femur
Insertion: patella then tibial tuberosity
Action: extend leg at knee

45
Q

Hamstrings (3x)

A

Biceps femoris
Semitendinosus
Semimembranosus

46
Q

Biceps femoris

A

Origin: ischial tuberosity, linea aspera of femur
Insertion: head of fibula and lateral condyle of tibia
Action: flexes leg at knee, extends thigh at hip

46
Q

Semitendinosus

A

Origin: ischial tuberosity
Insertion: proximal medial tibia
Action: flexes leg at knee, extends thigh at hip

46
Q

Semimembranosus

A

Origin: ischial tuberosity
Insertion: medial condyle of tibia
Action: flexes leg at knee, extends thigh at hip

47
Q

Thenar (3x)

A

Abductor pollicis brevis
Opponens pollicis
Flexor pollicis brevis
Adductor pollicis

47
Q

Hypothenar eminence (3x)

A

Abductor digiti minimi
Flexor digiti minimi brevis
Opponens digiti minimi

48
Q

Strap (ribbon) muscles (4x)

A

Omohyoid
Sternohyoid
Sternothyroid
Thyrohyoid

48
Q

Rotator (musculotendinous) cuff (4x)

A 
Subscapularis
Supraspinatus
Infraspinatus
Teres minor
Nearly complete circle of flat tendons from these 4 muscles, strengthen and stabilize.

A&P I (10 decks)

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