Extrinsic Muscles of the Thoracic Limb (Small Animal) Quiz

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Questions and Answers

What is the name of the highlighted muscle and its action?

Brachiocephalicus. Pull trunk caudally and extend shoulder (when in supporting position) or draw limb cranially and flex shoulder (when not supporting weight).
Deep pectoral. Pull trunk cranially and extend shoulder (when in supporting position) or draw limb caudally and flex shoulder (when not supporting weight). (correct)
Deep pectoral. Pull trunk caudally and extend shoulder (when in supporting position) or draw limb cranially and flex shoulder (when not supporting weight).
Brachiocephalicus. Pull trunk cranially and flex shoulder (when in supporting position) or draw limb caudally and extend shoulder (when not supporting weight).

What is the name of the highlighted muscle and its action?

Pars mastoidea (of cleidocephalicus). Advance limb, extend shoulder, draw head and neck to the side.
Pars cervicalis (of cleidocephalicus). Advance limb, extend shoulder, draw head and neck to the side. (correct)
Pars mastoidea (of cleidocephalicus). Advance limb, flex shoulder, draw head and neck to the side.
Pars cervicalis (of cleidocephalicus). Advance limb, flex shoulder, draw head and neck to the side.

What is the name of the highlighted muscle and its action?

Mastoid part (of sternocephalicus). Extend shoulder.
Occipital part (of sternocephalicus). Draw head and neck to the side.
Occipital part (of sternocephalicus). Extend shoulder.
Mastoid part (of sternocephalicus). Draw head and neck to the side. (correct)

What is the name of the highlighted muscle and its action?

Sternothyroideus. Pull tongue and larynx caudally. (C) Signup and view all the answers

What is the name of the highlighted muscle and its action?

Cleidocephalicus (of brachiocephalicus). Advance limb, extend shoulder, draw neck and head to the side. (B) Signup and view all the answers

What is the name of the highlighted muscle and its action?

Occipital part (of sternocephalicus). Draw head and neck to the side. (B) Signup and view all the answers

What is the name of the highlighted muscle and its action?

Rhomboideus capitis. Elevate forelimb and draw the scapula against the trunk. (D) Signup and view all the answers

What is the name of the highlighted muscle and its action?

Omotransversarius. Advance limb or flex the neck laterally. (C) Signup and view all the answers

What is the name of the highlighted muscle and its action?

Cervical part (of trapezius). Elevate and abduct forelimb. (A) Signup and view all the answers

What is the name of the highlighted muscle and its action?

Rhomboideus cervicis. Elevate forelimb and draw the scapula against the trunk. (C) Signup and view all the answers

What is the name of the highlighted muscle and its action?

Descending (superficial) pectoral. Adduct limb (when not weight bearing) or prevent limb abduction (when weight bearing). (A) Signup and view all the answers

What is the name of the highlighted muscle and its action?

Thoracic part (of trapezius). Elevate and abduct forelimb. (A) Signup and view all the answers

What is the name of the highlighted muscle and its action?

Serratus ventralis cervicis. Support trunk and depress scapula. (D) Signup and view all the answers

What is the name of the highlighted muscle and its action?

Cleidobrachialis (of brachiocephalicus). Advance limb, extend shoulder, draw neck and head to the side. (C) Signup and view all the answers

What is the name of the highlighted muscle and its action?

Transverse (superficial) pectoral. Adduct limb (when not weight bearing) or prevent limb abduction (when weight bearing). (D) Signup and view all the answers

What is the name of the highlighted muscle and its action?

Latissimus dorsi. Flex shoulder and draw the free limb caudally (as in digging) (A) Signup and view all the answers

What is the name of the highlighted muscle and its action?

Rhomboideus thoracis. Elevate forelimb and draw the scapula against the trunk. (B) Signup and view all the answers

What is the name of the highlighted muscle and its action?

Serratus ventralis thoracis. Support trunk and depress scapula. (B) Signup and view all the answers

What is the name of the highlighted muscle and its action?

Sternohyoideus. Pull tongue and larynx caudally. (D) Signup and view all the answers

What is the name of the highlighted muscle and its action?

Pars mastoidea (of cleidocephalicus). Advance limb, extend shoulder, draw head and neck to the side. (D) Signup and view all the answers

Study Notes

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