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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
M. Pectoralis descendens (superficial)- Origin
Manubrium sterni The smaller, cranial part of the Mm. Pectoralis superficialis
25
M. Pectoralis descendens (superficial)- Insertion
Humurus- Major tubercle crest, distal part | Together with- M. Pectoralis transversus
26
M. Pectoralis descendens- Function
Protraction (forward) or retraction | Adduction (towards middle line of body)
27
M. Pectoralis transversus (superficial)- Origin
Sternum- ventral part including manubrium to the 3rd costal cartilage
28
M. Pectoralis transversus (superficial)- Insertion
Humurus- grate tubercle crest, distal part | Together with- M. Pectoralis descendens
29
M. Pectoralis transversus (superficial)- Function
Protraction or retraction | Adduction
30
M. Pectoralis profundus- Origin
Sternum- on the ventral midline
31
M. Pectoralis profundus- Insertion
Humurus- Tub. Minus | + sends a band of muscle and aponeurosis to the cranio-medial part of Tub. Majus and proximal Crista tuberculi majoris
32
M. Pectoralis profundus- Function
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
M. Serratus Ventralis cervical part- Origin
Transvers processes C3-C7
34
M. Serratus Ventralis thoracic part- Origin
Ribs 1-8- lateral surface
35
M. Serratus ventralis- insertion
Scapula- Facies serrata
36
M. Serratus ventralis cervical part- Function
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
M. Serratus ventralis thoracic part-Function
Limb forward
38
M. Deltoideus pars scapularis- Origin
Scapula- broad aponeurosis of the spine
39
M. Deltoideus pars acromialis- Origin
Scapula- Acromion
40
M. Deltoideus- Insertion
Humurus- Tuberositas deltoidea
41
M. Deltoideus- Function
Flexion of the shoulder joint
42
M. Teres minor- Origin
Scapula- Tub. Infraglenoidale | +Distal caudal margin
43
M. Teres minor- Insertion
Humurus- tuberositas teres minor on the linea m. Tricipitis
44
M. Teres minor- Function
Flexion of shoulder point ( same as deltoid)
45
M. Infraspinatus- Origin
Scapula- Fossa infraspinata (no tendon)
46
M. Infraspinata- Insertion
Humurus- Facies m. Infraspinati (lateral side of grate tub.) by means of a Tendon
47
M. Infraspinatus- Function
Flexion (maybe extension) of the shoulder, abduction and outward rotation of Humurus The tendon acts as a lateral collateral ligament- stabilizes shoulder
48
M. Supraspinatus- Origin
Scapula- Fossa supraspinata (no tendon)
49
M. Supraspinatus- Insertion
Humurus- Tub. Majus
50
M. Supraspinatus- Function
Extension and stabilization of shoulder joint Strong tendon of insertion acts as a lateral collateral ligament
51
M. Coracobrachialis- Origin | Medial muscle
Scapula- proc. coracoideus | Long tendon
52
M. Coracobrachialis- Insertion | Medial muscle
Humurus- Crista tub. minoris | Distal part, caudal to the insertion of m. Triceps brachii medial head
53
M. Coracobrachialis- Function | Medial muscle
Adduction and extention of shoulder
54
M. Subscapularis- Origin | Medial muscle
Scapula- Fossa subscapularis
55
M. Subscapularis- Insertion | Medial muscle
Humurus- Tub. Minus
56
M. Subscapularis- Function | Medial muscle
Flexion, extension, adduction and stabilization of the shoulder Strong tendon of insertion acts as a medial collateral ligament
57
M. Teres major- Origin | Both lateral and medial muscle
Scapula- caudal angle and proximal caudal margin Origin in the lateral side
58
M. Teres major- Insertion | Both medial and lateral muscle
Humurus- Tuberositas teres major Medial aspect of Humurus, cranially to the m. triceps brachii medial insertion Insertion in the medial side
59
M. Teres major- Function | Both medial and lateral muscle
Flexion of the shoulder
60
M. Biceps brachii- Origin | Medial muscle
Scapula- Tub. Supraglenoidale The tendon run between the tubercles, held in place by Bursa intertubercularis and the deep pectoral muscle
61
M. Biceps brachii- Insertion | Medial muscle
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
M. Biceps brachii- Function | Medial muscle
Flexion of elbow joint Extension of shoulder joint
63
M. Triceps brachii long head- Origin
Scapula- Tub. Infraglenoidale and distal caudal margin
64
M. Triceps brachii latera head- Origin
Humurus- Linea m. Tricipitis
65
M. Triceps brachii medial head- Origin
Humurus- Crista tub. Minoris Caudal to the tuberositas teres major, cranial to the insertion of m. Corocobrachialis
66
M. Triceps brachii accessory head- Origin
Humurus- Caudal surface of neck (just under the head)
67
M. Triceps brachii- Insertion
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
M. Triceps brachii- Function
Extension of elbow Long head is a powerful flexor of the shoulder

Anatomy (2 decks)

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