Muscles Flashcards

1
Q

Sacrotuberous Ligament

A

O: Caudolateral apex of the sacrum and the transverse process of the caudal vertebrae 1
I: Lateral angle of ischiadic tuberosity
F: Site of anchorage for gluteal muscles and biceps femoris

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2
Q

Quadratus Lumborum

A

O: Vertebral bodies of thoracic vertebrae 11, 12, 13, transverse processes of all lumbar vertebrae and last two ribs
I: Medial surface of the wing of the ilium between articular surface and the cranial ventral iliac spine
A: Flexion and fixation of the vertebral column

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3
Q

Psoas Minor

A

O: Ventral surface of the last thoracic and first 4 - 5 lumbar vertebrae
I: Via a long tendon into the iliopubic eminence
A: Flexion of the vertebral column and pelvis against the thigh

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4
Q

Iliopsoas

A

O: Transverse process of lumbar vertebrae 2 - 3 and the ventral surface of lumbar 4 - 7 and the ventral surface of the ilium between the arcuate line and the lateral border
I: Lesser trochanter of the femur
A: Flexion of the hip joint

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5
Q

Tensor Fascia Latae

A

O: Coxal tuber and the aponeurosis of gluteus medius
I: Inserts into and contributes to the lateral femoral fascia
A: Flexion of the hip, abduction of the limb and extension of the stifle (via tensing of the lateral fascia)

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6
Q

Superficial Gluteal

A

O: Cranially from the sacral tuber and the gluteal fascia
Caudally from the sacrotuberous ligament and the lateral aspect of the sacrum and caudal vertebrae 1
I: Distal aspect of the greater trochanter of the femur
A: Extension of the hip joint

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7
Q

Medial Gluteal

A

O: Gluteal surface of ilium, iliac crest and sacral tuber
I: Greater trochanter of femur
A: Extension of the hip, medial rotation of hip and prevention of lateral rotation under weight bearing.

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8
Q

Deep Gluteal

A

O: Ilium near ischiadic spine
I: Cranial aspect of the greater trochanter
A: Extension of hip, abducts the limb, medial rotation of the hip

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9
Q

Piriformis

A

O: Lateral surface of the third sacral and caudal vertebra 1, sacrotuberous ligament
I: Greater trochanter of femur
A: Extension of the hip

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10
Q

Obturator Internus

A

O: Pelvic surface of pubis and ischium medial to obturator foramen
I: Trochanteric fossa
A: Lateral rotation of the thigh

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11
Q

Obturator Externus

A

O: Ventral surface of pelvis adjacent to pubic symphysis
I: Trochanteric fossa
A: Lateral rotation of thigh

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12
Q

Gemelli

A

O: Lateral surface of ramus of ischium
I: Trochanteric fossa
A: Lateral rotation of thigh

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13
Q

Quadratus Femoris

A

O: Ventral surface of ischium
I: Intertrochanteric crest
A: Lateral rotation of thigh

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14
Q

Pectineus

A

O: Iliopubic eminence of pubis and pubic tubercle via the republic tendon
I: Distal end of the medial lip of the caudal rough face of the femur
A: Adduction of the thigh at the hip

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15
Q

Adductor

A

O: Pubic tubercle and entire pelvic symphysis
I: Entire lateral lip and caudal surface of femur
A: Adduction of the limb and extension at the hip

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16
Q

Gracilis

A

O: Pelvic symphysis via the symphyseal tendon
I: Entire cranial border of the tibia and spreads out into the crural fascia forming a band to the common calcaneal tendon
A: Adduction of the limb, extension of the hip, flexion of the stifle, extension of the tarsus

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17
Q

Sartorius

A

O: CRANIAL - iliac crest and cranial ventral iliac spine
CAUDAL - Ridge between the ventral iliac spines
I: CRANIAL - Medial femoral fascia, proximal to the patella
CAUDAL - Fuses with gracilis in the crural fascia before inserting onto the cranial border of the tibia
A: Flexes the hip and thigh, adducts the thigh and extends the stifle

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18
Q

Rectus Femoris

A

O: Body of the ilium, cranial to the acetabulum
I: Via patellar ligament to the tibial tuberosity
A: Flexion of the hip and extension of the stifle via common insertion to quadriceps tendon

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19
Q

Vastus Lateralis

A

O: Craniolateral part of the proximal 1/5th of the femur
I: Via patellar ligament to the tibial tuberosity, unites with joint capsule
A: Extension of the stifle via common insertion to quadriceps tendon

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20
Q

Vastus Medialis

A

O: Proximal part of the medial lip of the femur and in the upper craniomedial 1/5th of the femur
I: Patella, tibial tuberosity
A: Extension of stifle

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21
Q

Vastus Intermedius

A

O: With vastus laterals and proximolateral part of femur
I: Vastus medialis and quadriceps tendon
A: All four muscles extend the stifle via their common insertion into the quadriceps tendon

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22
Q

Biceps Femoris

A

O: CRANIAL - Ventrocaudal end of the sacrotuberous ligament and ischial tuberosity
CAUDAL - Ischial tuberosity
I: CRANIAL - Via an aponeurosis to the fascia lata and fascia crura, to patella ligament and tibial tuberosity
CAUDAL - Via and aponeurosis to the fascia lata and fascia crura to insert on the tibial crest and then continues distally to contribute to the common calcanea tendon
A: CRANIAL - Extend the hip and weakly extend the stifle
CAUDAL - Flex the stifle and extend the tarsus
BOTH - Abduct and extend the entire hindlimb

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23
Q

Semitendinosus

A

O: Ischial tuberosity
I: Crural fascia, medial and cranial surface of tibia. Unites with tendon of Gracilis to the calcanea tuberosity and contributes to the common calcaneal tendon
A: Extension at the hip and tarsus. Main flexor of stifle when limb is off the ground.

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24
Q

Semimembranosus

A

O: Ischial tuberosity
I: CRANIAL - medial condyle and medial lip of femur
CAUDAL - Medial condyle of tibia under the medial collateral ligament
A: CRANIAL - purely hip extender
CAUDAL - extends the hip and flexes the stifle

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25
Q

Cranial Tibial

A

O: Medial to the extensor groove and lateral edge of the cranial border of the tibia
I: Base of metatarsals 1 and 2 on the plantar surface
A: Flexion at the tarsus and lateral rotation of the paw

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26
Q

Fibularis Longus

A

O: Lateral condyle of the tibia, lateral collateral ligament and head of fibula
I: 4th tarsal bone and plantar surfaces of all metatarsals
A: Flex the tarsus

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27
Q

Fibularis Brevis

A

O: Lateral surface of distal 2/3rd of fibula and tibia
I: Proximal end of metatarsal V
A: Flex the tarsus

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28
Q

Gastrocnemius

A

O: LATERAL HEAD - Lateral supracondylar tuberosity of femur
MEDIAL HEAD - Medial supracondylar tuberosity of femur
I: Both heads insert onto the calcaneal tuberosity - main contributor to calcaneal tendon
A: Main extensor of the tarsus, flexion of stifle sometimes

29
Q

Superficial Digital Flexor

A

O: Lateral supracondylar tuberosity of the femur with the lateral head of gastrocnemius
I: Tendon caps the calcaneal tuberosity, continues distally to divide into four tendons at distal row of tarsus then extends over metatarsals 2 - 5
A: Flexion of the digits

30
Q

Deep Digital Flexor

A

O: LATERAL HEAD - Caudal surface of the proximal 3/5th of the fibula and proximal caudolateral border of the tibia, interosseous membrane
MEDIAL HEAD - Head of fibula, popliteal line
I: Both lateral and medial heads fuse at the mid tarsus, then divide into 4 tendons to insert onto the flexor tubercle of the distal phalanx of digits 2 - 5
A: Flexion of the digits

31
Q

Caudal Tibial

A

O: Proximal end of fibula
I: Ligamentous mass at tarsus - medial side
A: Flexion of the digits

32
Q

Long Digital Extensor

A

O: Extensor fossa of the lateral epicondyle of the femur
I: Tendon splits into four to insert onto the formal surface (extensor process) of the distal phalanx of digits 2 - 5
A: Extension of digits

33
Q

Lateral Digital Extensor

A

O: Proximal 1/3rd of fibula
I: Unites with long digital extensor to insert on the proximal phalanx of digit V
A: Extension of the digits

34
Q

Muscles involved in the muscular sling

A
  • Deep pectoral
  • Serratus Ventralis
  • Trapezius
  • Rhomboideus
35
Q

Trapezius

A

O: CERVICAL - cervical vertebra 3 to thoracic vertebra 2, median tendinous raphe and supraspinous ligament
THORACIC - Supraspinous ligament and transverse process of thoracic vertebrae 3 to 9
I: CERVICAL - Spine of scapula including acromion
THORACIC - Proximal third of the spine of the scapula into an aponeurosis
A: Elevates and protracts the limb, stabilises the shoulder, assists in abduction of the limb

36
Q

Rhomboideus

A

O: CERVICUS - Tendinous raphe and spinous process of cervical vertebrae 2 to thoracic vertebrae 3
CAPITUS - Cranial to cervical vertebrae 4
THORACIS - Spinous process of thoracic vertebrae 4 - 7
I: CERVICUS - Medial aspect of dorsal margin of scapula near cranial angle
CAPITUS - Occiput of skull
THORACIS - Medial aspect of dorsal margin of the scapula
A: Elevates the thoracic limb, advance and retract limb, adducts scapula, can raise neck when shoulder is fixed. Walking and nodding movement of head.

37
Q

Serratus Ventralis

A

O: CERVICAL - Transverse process of cervical vertebrae 3 - 7
THORACIC - Ribs 1 - 8
I: BOTH - Facies serrata of scapula
A: Most important component of muscular sling, when limbs fixed it raises the neck and protracts the trunk, protracts and retracts the scapula

38
Q

Omotransversarius

A

O: Acromion of scapula
I: Wing of atlas
A: Pull the free limb cranially (advance)

39
Q

Brachiocephalicus

A

O: All - Clavicular tendon
I: CLEIDOCERVICALIS - Dorsal fibrous raphe of the cranial half of the neck
CLEIDOMASTOIDEUS - Mastoid process of temporal bone
CLEIDOBRACHIALIS - Distally on the cranial aspect of the humorous between biceps brachii and brachialis
A: Protracts the limb and fixes the neck

40
Q

Superficial Pectoral

Pectoralis Descendens

A

O: Maniubrium of sternum
I: Greater tubercle crest of humerus
A: Adduction of limb, protract limb

41
Q

Superficial Pectoral

Pectoralis Transversus

A

O: Sternum (first 2 or 3 elements)
I: Greater tubercle crest of humerus
A: Adduction of limb

42
Q

Deep Pectoral

A

O: Sternum including xiphoid process
I: Lesser tubercle crest of humerus, mid shaft humerus, via an aponeurosis to greater tubercle

43
Q

Latissimus Dorsi

A

O: Thoracolumbar fascia, spinous process of lumbar vertebrae 7 - 1 and thoracic vertebrae 13 - 5
O: Via and aponeurosis onto teres major tuberosity, crest of the greater tubercle via deep branch to pectoral muscles
A: Flexion of the shoulder, draw free limb caudally (digging)

44
Q

Supraspinatus

A

O: Supraspinous fossa of the scapula
I: Proximomedial aspect of greater tubercle of humerus
A: Extension of the shoulder, fixes and stabilises shoulder under weight

45
Q

Infraspinatus

A

O: Infraspinous fossa of scapula
I: Distal aspect of greater tubercle of humorous, joint capsule of shoulder
A: Flexion of the shoulder, extension of the shoulder joint, abduction of humerus, lateral rotation of humorous, stabilises and fixes the joint by acting as a lateral collateral ligament

46
Q

Deltoideus

A

O: Spine of scapula via aponeurosis and acromion
I: Deltoid tuberosity
A: Flexion and abduction of the humerus at the shoulder

47
Q

Teres Minor

A

O: Infraglenoid tubercle, distal 3rd of caudal margin of scapula
I: Teres minor tuberosity
A: Flexion of the humerus at shoulder

48
Q

Subscapularis

A

O: Subscapular fossa
I: Lesser tubercle of the humerus, joint capsule of shoulder
A: Extension and adduction at shoulder, stabilises the shoulder by acting as medial collateral ligament

49
Q

Teres Major

A

O: Caudal angle and caudal margin of scapula
I: Teres major tuberosity
A: Flexion at the shoulder

50
Q

Coracobrachialis

A

O: Coracoid process of scapula
I: Craniomedial surface of humerus ending on the crest of the lesser tubercle
A: Extension and adduction at the shoulder

51
Q

Biceps Brachii

A

O: Supraglenoid tubercle of scapula
I: Ulnar tuberosity, radial tuberosity, antebrachial fascia
A: Flexion of the elbow, extension of the shoulder

52
Q

Brachialis

A

O: Proximocaudal aspect of humerus
I: Ulnar tuberosity, tendon of biceps brachii
A: Flexion of elbow

53
Q

Triceps Brachii

A

O: LONG HEAD - Distal 2/3rd of caudal border of scapula and infraglenoid tubercle
LATERAL HEAD - Greater tubercle crest and tricipital line
MEDIAL HEAD - Lesser tubercle crest
ACCESSORY HEAD - Caudal aspect of humerus distal to head
I: ALL - common tendon of insertion to olecranon of ulna
A: Extension of elbow

54
Q

Anconeus

A

O: Lateral supracondylar crest, lateral epicondyle, medial epicondyle of humerus
I: Proximolateral aspect of olecranon of ulna
A: Extension of elbow

55
Q

Tensor Fascia Antebrachii

A

O: Lateral surface of latissimus dorsi
I: Common insertion with triceps brachia, ante brachial fascia
A: Extension of elbow joint

56
Q

Pronator Teres

A

O: Medial epicondyle of humerus
I: Proximomedial surface of radius
A: Pronation

57
Q

Pronator Quadratus

A

O: Medial surface of ulna
I: Caudal surface of radius, covers interosseous membrane and ligament
A: Pronation

58
Q

Supinator

A

O: Lateral epicondyle of humerus and lateral collateral ligament (sesamoid bone in tendon of origin)
I: Proximal 1/4th of radius, cranial aspect ending on the medial border
A: Supinate the forearm

59
Q

Brachioradialis

A

O: Lateral supracondylar ridge
I: Distal 1/3rd of radius
A: Supinate forearm

60
Q

Flexor Carpi Radialis

A

O: Medial epicondyle of humerus
I: Base of metacarpals 2 and 3 (palmar aspect) enclosed in tendon sheath
A: Flexion of carpus

61
Q

Flexor Carpi Ulnaris

A

O: ULNAR HEAR - Caudomedial aspect of olecranon
HUMERAL HEAD - Medial epicondyle of humerus
I: BOTH - Accessory carpal bone
A: Flexion of the carpus

62
Q

Extensor Carpi Radialis

A

O: Lateral supracondylar ridge
I: Dorsal aspect of the base of metacarpals 2 and 3
A: Extension of the carpus

63
Q

Ulnaris Lateralis

A

O: Lateral epicondyle of humerus
I: Accessory carpal bone and proximolateral on metacarpal V
A: Flexion of the carpus

64
Q

Superficial Digital Flexor (Forelimb)

A

O: Medial epicondyle of humerus
I: Both sides of the palmar aspect of the proximal border of the middle phalanx of digits 2 - 5
A: Flexion of the carpus, metacarpophalangeal and proximal interphalangeal joints

65
Q

Deep Digital Flexor (Forelimb)

A

O: HUMERAL HEAD - Medial epicondyle of humerus
ULNAR HEAD - Distal 1/4th of caudal border of ulna
RADIAL HEAD - Proximal 3/5th of medial border of radius
I: ALL - Flexor protuberance of the distal phalanx of digits 2 - 5
A: Flexion of the carpus, metacarpophalangeal, proximal interphalangeal and distal interphalangeal joints

66
Q

Common Digital Extensor

A

O: Lateral epicondyle of humorous
I: Dorsal aspect of distal phalanx of digits 2 - 5
A: Extension of the carpus, metacarpophalangeal, proximal interphalangeal and distal interphalangeal joints

67
Q

Lateral Digital Extensor

A

O: Lateral epicondyle of humorous and cranial margin of the lateral collateral ligament
I: Caudal tendon inserts onto the dorsal aspect of the proximal phalanx of digit 5 and then unites with the tendon of the common digital extensor to insert on to the distal phalanx. Cranial tendon branches at the carpus to insert on the dorsal aspect of the proximal phalanx of digits 3 and 4 and then units with the tendon of common digital extensor to insert onto distal phalanx

68
Q

Abductor Digiti 1 Longus

A

O: Lateral surface of radius, ulna and interosseous membrane
I: Proximomedially on metacarpal 1
A: Abduction and extension of digit 1, medial deviation of the forepaw

69
Q

Interosseous Muscles (Palmar)

A

O: Proximal ends of metacarpals 2 - 5
I: Proximal ends of proximal phalanx after splitting in two
A: Protect and flex the metacarpophalangeal joint, keep the digits straight