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Anatomy > Forelimb: Muscles > Flashcards

Forelimb: Muscles Flashcards

0
Q

M. Trapezium Pars cervicalis- insertion

A

Pars cervicalis- Spina scapulae (except ventral part)

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1
Q

M. Trapezium Pars cervicalis- origin

A

Pars cervicalis- median fibrous raphe (cranially to C3)

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2
Q

M. Trapezium- Function

A

Pars cervicalis- advances the limb (ventral angle rotates cranially)
Pars thoracica- retracts the limb (rotates caudally)
Together- lift the limb (rise scapula against trunk)

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3
Q

M. Trapezium: Pars thoracica- Origin

A

Pars thoracica- Lig. Supraspinale (caudally to T9)

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4
Q

M. Trapezium: Pars thoracica- Insertion

A

Pars thoracica- Spina scapulae (dorsal third)

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5
Q

M. Latissimus dorsi- Origin

A

Broad aponeurosis of Superficial Thoracolunbar Fascia

+ Lateral surface of last three ribs

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6
Q

M. Latissimus dorsi- Insertion

A

Humurus: Tuberositas teres major

+Fascia of the medial m. Triceps brachii caput longum

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7
Q

M. Latissimus dorsi- Function

A

Free limb: unilateral retraction of limb
Flexion of shoulder

Fixed limb: trunk forward and Flexion of the back

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8
Q

M. Rhomboideus capitis- Origin

A

Lateral edge of m. M. Rhomboideus cervicis at C4

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9
Q

M. Rhomboideus capitis- insertion

A

Crista nuchae

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10
Q

M. Rhomboideus cervicis- origin

A

Median fibrous raphe (cranially C2)

+Spinous processes T1-T3

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11
Q

M. Rhomboideus cervicis- insertion

A

Scapula- medially on dorsal margin

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12
Q

M. Rhomboideus thoracis- Origin

A

Spinous processes T4-T7

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13
Q

M. Rhomboideus thoracis- Insertion

A

Scapula- medially on dorsal margin

+Laterally just cranially to caudal angle

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14
Q

M. Rhomboideus:-Function

A

Free limb- advance or retract, elevation of scapula and limb

Fixed limb- bilateral stabilize head, extension of neck
Unilateral Flexion of neck laterally

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15
Q

M. Cleidobrachialis- Origin

A

Distal component of m. Brachiocephalicus

Intersectio clavicularis

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16
Q

M. Cleidobrachialis- Insertion

A

Humurus- Crista humerii, medial (relatively distal)

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17
Q

M. Cleidocephalicus- Origin

A

Intersectio clavicularis

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18
Q

M. Cleidocephalicus cervical part- insertion

A

Crostata nuchae

+median fibrous raphe of neck

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19
Q

M. Cleidocephalicus mastoide part- insertion

A

Temporal bone- Mastoid proc.

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20
Q

M. Brachicephalicus- Function

A

Free limb- advances the limb

Fixed limb- bilateral flexes the neck, unilateral flexes the neck laterally

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21
Q

M. Omotransversarius- Origin

A

Scapula- spine (ventral part)

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22
Q

M. Omotransversarius- Insertion

A

Wing of the atlas

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23
Q

M. Omotransversarius- Function

A

Free limb- advances the limb

Fixed limb- bilateral contraction flexes the neck, unilateral flexes neck laterally

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24
Q

M. Pectoralis descendens (superficial)- Origin

A

Manubrium sterni

The smaller, cranial part of the Mm. Pectoralis superficialis

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25
Q

M. Pectoralis descendens (superficial)- Insertion

A

Humurus- Major tubercle crest, distal part

Together with- M. Pectoralis transversus

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26
Q

M. Pectoralis descendens- Function

A

Protraction (forward) or retraction

Adduction (towards middle line of body)

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27
Q

M. Pectoralis transversus (superficial)- Origin

A

Sternum- ventral part including manubrium to the 3rd costal cartilage

28
Q

M. Pectoralis transversus (superficial)- Insertion

A

Humurus- grate tubercle crest, distal part

Together with- M. Pectoralis descendens

29
Q

M. Pectoralis transversus (superficial)- Function

A

Protraction or retraction

Adduction

30
Q

M. Pectoralis profundus- Origin

A

Sternum- on the ventral midline

31
Q

M. Pectoralis profundus- Insertion

A

Humurus- Tub. Minus

+ sends a band of muscle and aponeurosis to the cranio-medial part of Tub. Majus and proximal Crista tuberculi majoris

32
Q

M. Pectoralis profundus- Function

A

Free limb- retraction and addction. If limb is not supporting weight- can flex the shoulder

Fixed limb (supporting weight)- trunk forward, shoulder extension (Scapula and Humurus grow apart)

Suspension of the trunk

(השריר מחובר לחיבור בין שתי עצמות כמעט, לדמיין מה קורה כאשר ההומוריסטי לא יכול לזוז בחלקו הדיסטאלי)

33
Q

M. Serratus Ventralis cervical part- Origin

A

Transvers processes C3-C7

34
Q

M. Serratus Ventralis thoracic part- Origin

A

Ribs 1-8- lateral surface

35
Q

M. Serratus ventralis- insertion

A

Scapula- Facies serrata

36
Q

M. Serratus ventralis cervical part- Function

A

Free limb- retraction of the limb (rotates Scapula counter-clockwise)

Fixed limb- bilateral lifts the neck (extension), unilateral flexes the neck laterally

Whole muscle suspends trunk

37
Q

M. Serratus ventralis thoracic part-Function

A

Limb forward

38
Q

M. Deltoideus pars scapularis- Origin

A

Scapula- broad aponeurosis of the spine

39
Q

M. Deltoideus pars acromialis- Origin

A

Scapula- Acromion

40
Q

M. Deltoideus- Insertion

A

Humurus- Tuberositas deltoidea

41
Q

M. Deltoideus- Function

A

Flexion of the shoulder joint

42
Q

M. Teres minor- Origin

A

Scapula- Tub. Infraglenoidale

+Distal caudal margin

43
Q

M. Teres minor- Insertion

A

Humurus- tuberositas teres minor on the linea m. Tricipitis

44
Q

M. Teres minor- Function

A

Flexion of shoulder point ( same as deltoid)

45
Q

M. Infraspinatus- Origin

A

Scapula- Fossa infraspinata (no tendon)

46
Q

M. Infraspinata- Insertion

A

Humurus- Facies m. Infraspinati (lateral side of grate tub.) by means of a Tendon

47
Q

M. Infraspinatus- Function

A

Flexion (maybe extension) of the shoulder, abduction and outward rotation of Humurus

The tendon acts as a lateral collateral ligament- stabilizes shoulder

48
Q

M. Supraspinatus- Origin

A

Scapula- Fossa supraspinata (no tendon)

49
Q

M. Supraspinatus- Insertion

A

Humurus- Tub. Majus

50
Q

M. Supraspinatus- Function

A

Extension and stabilization of shoulder joint

Strong tendon of insertion acts as a lateral collateral ligament

51
Q

M. Coracobrachialis- Origin

Medial muscle

A

Scapula- proc. coracoideus

Long tendon

52
Q

M. Coracobrachialis- Insertion

Medial muscle

A

Humurus- Crista tub. minoris

Distal part, caudal to the insertion of m. Triceps brachii medial head

53
Q

M. Coracobrachialis- Function

Medial muscle

A

Adduction and extention of shoulder

54
Q

M. Subscapularis- Origin

Medial muscle

A

Scapula- Fossa subscapularis

55
Q

M. Subscapularis- Insertion

Medial muscle

A

Humurus- Tub. Minus

56
Q

M. Subscapularis- Function

Medial muscle

A

Flexion, extension, adduction and stabilization of the shoulder

Strong tendon of insertion acts as a medial collateral ligament

57
Q

M. Teres major- Origin

Both lateral and medial muscle

A

Scapula- caudal angle and proximal caudal margin

Origin in the lateral side

58
Q

M. Teres major- Insertion

Both medial and lateral muscle

A

Humurus- Tuberositas teres major
Medial aspect of Humurus, cranially to the m. triceps brachii medial insertion

Insertion in the medial side

59
Q

M. Teres major- Function

Both medial and lateral muscle

A

Flexion of the shoulder

60
Q

M. Biceps brachii- Origin

Medial muscle

A

Scapula- Tub. Supraglenoidale

The tendon run between the tubercles, held in place by Bursa intertubercularis and the deep pectoral muscle

61
Q

M. Biceps brachii- Insertion

Medial muscle

A

Ulna and radius- tendon divides into two- stronger part on medial ulna, distally to the coronoid process.
-weaker part on tuberositas radii.

The insertion is sheared with the m. Brachialis

62
Q

M. Biceps brachii- Function

Medial muscle

A

Flexion of elbow joint

Extension of shoulder joint

63
Q

M. Triceps brachii long head- Origin

A

Scapula- Tub. Infraglenoidale and distal caudal margin

64
Q

M. Triceps brachii latera head- Origin

A

Humurus- Linea m. Tricipitis

65
Q

M. Triceps brachii medial head- Origin

A

Humurus- Crista tub. Minoris

Caudal to the tuberositas teres major, cranial to the insertion of m. Corocobrachialis

66
Q

M. Triceps brachii accessory head- Origin

A

Humurus- Caudal surface of neck (just under the head)

67
Q

M. Triceps brachii- Insertion

A

Ulna- Olecranon

The tendon is surrounded by Bursa- B. Subtendinea m. Triceps brachii between tendon and olecranon and between the tendon and the skin- B. Subcutanea olecrani

68
Q

M. Triceps brachii- Function

A

Extension of elbow

Long head is a powerful flexor of the shoulder

Anatomy (2 decks)

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