CCAT Canine Anatomy and Biomechanics 5

Question 1

The supraspinatus muscle in dogs inserts on which structure and may develop tendinopathy affecting shoulder function?

Accepted Answer

Greater tubercle of the humerus

Answer

The supraspinatus inserts on the greater tubercle of the humerus and is a common site of calcifying tendinopathy causing chronic shoulder lameness in dogs.

Question 2

Which joint capsule structure contributes most to passive hip joint stability in dogs without significant muscular support?

Accepted Answer

Acetabular labrum

Answer

The acetabular labrum deepens the acetabulum and creates a suction-cup effect that significantly contributes to passive hip joint congruity and stability.

Question 3

During canine locomotion, which phase describes the period when a foot is not in contact with the ground?

Accepted Answer

Swing phase

Answer

The swing phase is the period of the gait cycle when the limb is lifted and moving forward through the air without ground contact.

Question 4

The lumbosacral junction (L7-S1) is a common site of pathology in dogs because:

Accepted Answer

It represents a transition from mobile lumbar to fixed sacral vertebrae, creating high stress concentration

Answer

The L7-S1 junction is biomechanically vulnerable because it transitions from the flexible lumbar spine to the rigid sacrum, concentrating shear and compressive forces at this level.

Question 5

Which muscle provides the primary active stabilization of the canine shoulder joint during dynamic loading?

Accepted Answer

Infraspinatus and subscapularis (rotator cuff equivalent)

Answer

The infraspinatus and subscapularis, along with the supraspinatus and teres minor, form the canine rotator cuff equivalent that dynamically stabilizes the shoulder during movement.

CCAT Practice Test

CCAT Practice Test

CCAT Canine Anatomy and Biomechanics 5