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Questions and Answers
Which of the following is included in the extrinsic muscles of the thoracic limb but is NOT an extrinsic muscle of the forelimb
Which of the following is included in the extrinsic muscles of the thoracic limb but is NOT an extrinsic muscle of the forelimb
Match the following origins and interstions to the appropriate muscle
Match the following origins and interstions to the appropriate muscle
Superficial Pectoral: Origin = Sternum Deep Pectoral: Origin = Sternum Superficial Pectoral: Insertion = Greater Tubercle of Humerus Deep Pectoral: Insertion = Lesser Tubercle of Humerus
What is the name of this articulation?
What is the name of this articulation?
Based off of these pictures, what are the names of these deep pits or depressions? (caudal, cranial)
Based off of these pictures, what are the names of these deep pits or depressions? (caudal, cranial)
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The opening through the distal portion of the humerus is called
The opening through the distal portion of the humerus is called
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What are the two pectoral muscles that make up the superficial pectorals?
What are the two pectoral muscles that make up the superficial pectorals?
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This muscle extends from the sternum to the humerus and is larger and longer than the superficial pectoral muscles. What muscle is being described?
This muscle extends from the sternum to the humerus and is larger and longer than the superficial pectoral muscles. What muscle is being described?
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The cleidobrachialis and cleidocephalicus make up which extrinsic muscle?
The cleidobrachialis and cleidocephalicus make up which extrinsic muscle?
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This extrinsic muscle originates on the first sternebra/manubrium and inserts on the mastoid part of the temporal bone and the nuchal crest of the occipital bone. It's action is to draw the head and neck to the side. Which muscle is being described?
This extrinsic muscle originates on the first sternebra/manubrium and inserts on the mastoid part of the temporal bone and the nuchal crest of the occipital bone. It's action is to draw the head and neck to the side. Which muscle is being described?
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Match the correct origin and insertion to the appropriate muscle(s)
Match the correct origin and insertion to the appropriate muscle(s)
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The action of the brachiocephalicus is to ________ the limb, ________ the shoulder joint and draw the neck and head to the side.
The action of the brachiocephalicus is to ________ the limb, ________ the shoulder joint and draw the neck and head to the side.
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The omotransversarius originates from the _________ and inserts on the ________ of the spine of the scapula.
The omotransversarius originates from the _________ and inserts on the ________ of the spine of the scapula.
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What is the omotransversarius responsible for? (looking for action of the muscle)
What is the omotransversarius responsible for? (looking for action of the muscle)
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The trapezius is divided into __________ and _________ parts
The trapezius is divided into __________ and _________ parts
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Identify the muscles covered, from proximal to distal
Identify the muscles covered, from proximal to distal
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What view is this? From this view, identify the labeled muscle. Can you name the origin and insertion?
What view is this? From this view, identify the labeled muscle. Can you name the origin and insertion?
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Match the muscle to it's color coded portion.
Match the muscle to it's color coded portion.
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What two muscles insert on the teres major tuberosity?
What two muscles insert on the teres major tuberosity?
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What are the muscles above? Remember these are the deeper muscles of the canine.
What are the muscles above? Remember these are the deeper muscles of the canine.
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Study Notes
Extrinsic Muscles of the Thoracic Limb
- The brachiocephalicus is an extrinsic muscle of the thoracic limb but not of the forelimb.
Identification of Muscles
- The two pectoral muscles that make up the superficial pectorals are not specified, but the pectoralis descendens is a superficial pectoral muscle that extends from the sternum to the humerus and is larger and longer than the superficial pectoral muscles.
- The cleidobrachialis and cleidocephalicus make up the cleidocephalicus muscle.
- The muscle that originates on the first sternebra/manubrium and inserts on the mastoid part of the temporal bone and the nuchal crest of the occipital bone, drawing the head and neck to the side, is the sternocleidomastoid muscle.
Actions of Muscles
- The action of the brachiocephalicus is to elevate, adduct, and draw the neck and head to the side.
- The omotransversarius originates from the spinal segment and inserts on the spine of the scapula, and is responsible for raising the point of the shoulder and assisting in flexion of the shoulder joint.
- The trapezius is divided into descending and transverse parts.
Muscle Identification
- The muscles covered from proximal to distal are not specified, but the labeled muscle in the view is the trapezius.
- The origin and insertion of the trapezius are not specified, but it is matched to a color-coded portion.
Deep Muscles of the Canine
- The two muscles that insert on the teres major tuberosity are not specified, but the muscles above are the deeper muscles of the canine.
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Description
Identify the extrinsic muscle of the thoracic limb that is not an extrinsic muscle of the forelimb. This quiz is for students of anatomy and physiology.
