Muscles of the forelimb Flashcards by morgan jones

Q

Define: Synsarcosis

A

Attachment of a structure to the skeleton by muscles

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Q

Origin: Trapezius

A

Dorsal midline from C2 to C7

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Q

Insertion: Trapezius

A

Spine of scapula

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Q

Action: Trapezius

A

Draws leg forward (protraction)

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Q

Origin: Pectoral muscles

A

Ribs & sternum

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Q

Insertion: Pectoral muscles

A

Humerus

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Q

Action: Pectoral muscles

A

Adduct limb

Hold forelimb against body wall

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Q

Origin: Latissimus dorsi

A

Thoracic spine

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Q

Insertion: Latissimus dorsi

A

Humerus

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Q

Action: Latissimus dorsi

A

Retracts forelimb

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Q

Origin: Brachiocephalicus

A

Base of skull

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Q

Insertion: Braciocephalicus

A

Cranial aspect of humerus

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Q

Action: Brachiocephalicus

A

Flexes neck, bends neck laterally

Draws foreleg forwards

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Q

Origin: Supraspinatus

A

Supraspinous fossa of scapula

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Q

Insertion: Supraspinatus

A

Greater tubercle of humerus

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Q

Action: Supraspinatus

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A

Extend shoulder

Stabilise shoulder joint

Q

Origin: Infraspinatus

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A

Infraspinatus fossa of scapula

Q

Insertion: Infraspinatus

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A

Greater tubercle of humerus

Q

Action: Infraspinatus

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A

Flex shoulder

Stabilise shoulder joint

Q

Origin: Triceps brachii

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A

Three of four heads from proximal humerus

Fourth head from scapula

Q

Insertion: Triceps brachii

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A

Olecranon of ulna

Q

Action: Triceps brachii

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A

Extend elbow joint

Q

Origin: Biceps brachii

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A

Supraglenoid tubercle of scapula

Q

Insertion: Biceps brachii

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A

Radius and ulna

Action: Biceps brachii

Flex elbow joint

Origin: Brachialis

Humerus

Insertion: Brachialis

Radius and ulna

Action: Brachialis

Flex elbow joint

Origin: Carpal extensors

Humerus

Insertion: Carpal extensors

Carpals

Origin: Digital extensors

Humerus

Insertion: Digital extensors

Third phalanx

Insertion: Superficial digital flexor

Second phalanx

Insertion: Deep digital flexor

Third phalanx