Major muscles Flashcards

1
Q

Facial muscles

A

Masseter

Temporalis

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2
Q

Masseter

A

Origin: Zygomatic bone
Insertion Caudal ramus of mandible
Action: Assists with mastication

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3
Q

Temporalis

A

O: Parietal crest
I: Coronoid process
A: Assists with mastication

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4
Q

Muscles of the lateral neck

A

Sternocephalicus

Brachiocephalicus

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5
Q

Sternocephalicus

A

O: Manubrium
I: Temporal bone, nuchal crest
A: Flexes head laterally

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6
Q

Brachiocephalicus

A

O: Clavicular intersection
I: Dorsal neck, proximal humerus
A: Pulls limb forward

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7
Q

Muscles of the thorax

A

Intercostal muscles
Serratus ventralis
Pectorals

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8
Q

Intercostal muscles

A

O: Caudal border of cranial rib
I: Cranial border of caudal rib
A: Assists with respiration

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9
Q

Serratus ventralis

A

O: Ribs 1-7
I: Dorsal border of medial scapula
A: Abducts scapula

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10
Q

Pectorals

A

O: Cranial sternum
I: Proximal humerus
A: Flexion of humerus

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11
Q

Muscles of the shoulder

A

Deltoid muscle
Supraspinatus
Infraspinatus

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12
Q

Deltoid muscle

A

O: Spine of scapula, acromion
I: Deltoid tuberosity of humerus
A: Flexion of shoulder

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13
Q

Supraspinatus

A

O: Supraspinous fossa
I: Greater and lesser tubercle of humerus
A: Stabilizes shoulder

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14
Q

Infraspinatus

A

O: Infraspinous fossa
I: Greater tubercle of humerus
A: Stabilizes shoulder

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15
Q

Muscles of the upper forelimb

A

Triceps brachii
Brachialis
Biceps brachii

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16
Q

Triceps brachi

A

O: Infraglenoid tubercle of scapula, caudal border of scapula, proximal humerus
I: Olecranon process
A: Extends the elbow

above the Brachialis

17
Q

Brachialis

A

O: Proximal/medial humerus
I: Proximal radius
A: Flexion of elbow

lateral

18
Q

Biceps brachii

A

O: Supraglenoid tubercle of scapula
I: Proximal radius
A: Flexion of elbow

Medial

19
Q

Muscle of the back

A

Trapezius
Latissimus dorsi
Rhomboideus
Splenius

20
Q

Trapezius

A

O: Dorsal cervical and thoracic vertebrae
I: Spine of scapula
A: Elevates shoulder and draws limb forward
Superficial

21
Q

Latissimus dorsi

A

O: Dorsal thoracic to lumbar vertebrae
I: Proximal-medial humerus
A: Flexion of shoulder

One of the largest muscles
Above the trapezius

22
Q

Rhomboideus

A

O: Dorsal neck and thorax
I: Dorsal border of scapula
A: Draws shoulder dorsocranially

Deep to trapezius

23
Q

Splenius

A

O: Dorsal process of T1-3 along thoracic vertebrae
I: Occipital/temporal-nuchal crest
A: Extension of head and neck

Deep to Rhomboideus

24
Q

Muscles of medial thigh

A

Sartorius-cranial

Gracilis-caudal

25
Q

Sartorius

A

O: Wings of ilium
I: Medial stifle
A: Flexion of hip

26
Q

Gracilis

A

O: Pelvic Symphysis
I: Medial stifle
A: Adduction of hip

Caudal to sartorius

27
Q

Muscles of the cranial thigh: Quadriceps

A

Rectus femoris
Vastus medialis
Vatstus lateralis
Vastus intermedius

28
Q

Rectus femoris

A

O: Caudal ilium -near acetabulum
I: Tibial tuberosity
A: Extension of stifle

leader/center

29
Q

Vastus medialis

A

O: Proximal femur
I: Tibial tuberosity
A: Extension of stifle

Medial side

30
Q

Vastus lateralis

A

O: Proximal femur
I: Tibial tuberosity
A: Extension of stifle

Lateral side

31
Q

Vastus intermedius

A

O: Proximal femur
I: Tibial tuberosity
A: Extension of stifle

Directly deep to Rectus femoris

32
Q

Muscles of the caudal thigh: Hamstrings

A

Biceps femoris
Semitendinosus
Semimembranosus

33
Q

Biceps femoris

A

O: Ischial tuberosity
I: Stifle and proximal tibia
A: Extension of hip

Largest muscle, most lateral

34
Q

Semitendinosus

A

O: Ischial tuberosity
I: Proximal/caudal tibia
A: Flexion of stifle

Middle
Inserts more distally than other two

35
Q

Semimembranosus

A

O: Ischial tuberosity
I: Medial caudal femur/tibia
A: Flexion of stifle

Most medial

36
Q

Gastrocnemius

A

O: Distal/caudal femur- proximal to condyles
I: Calcaneous
A: Extension of tarsus, flexion of stifle

Calf muscle

37
Q

Linea alba

A

Holds together external abdominal muscles at ventral mid line

Aponeuroses

38
Q

Fascia lata

A

Binds thigh muscles together tightly