ECC Equine Anatomy & Physiology 2

Question 1

Which ligament runs along the dorsal aspect of the equine spine and plays a key role in the 'bow and string' mechanism?

Accepted Answer

Nuchal ligament

Answer

The nuchal ligament forms the 'string' of the bow-and-string mechanism, storing elastic energy during locomotion to support the head and neck.

Question 2

The cervical vertebrae of the horse number how many, and which is the most mobile segment?

Accepted Answer

7 vertebrae; C2-C3

Answer

Horses have 7 cervical vertebrae, and the C2-C3 (axis-third cervical) junction exhibits the greatest range of lateral flexion.

Question 3

What is the primary function of the interosseous muscle (suspensory ligament) in the equine distal limb?

Accepted Answer

Passively support the fetlock against hyperextension

Answer

The suspensory ligament is a largely fibrous structure that passively suspends the fetlock, preventing hyperextension under weight-bearing.

Question 4

Which thoracic vertebrae in the horse are known as the 'anticlinal vertebrae' and what is their significance?

Accepted Answer

T14-T16, where spinous processes change direction

Answer

The anticlinal vertebrae (typically T14-T16) are where spinous processes transition from caudally inclined to vertically or cranially inclined, marking a biomechanical transition zone.

Question 5

The equine atlantoaxial joint primarily permits which type of movement?

Accepted Answer

Axial rotation

Answer

The atlantoaxial joint (C1-C2) is a pivot joint that primarily allows axial rotation of the head and atlas around the dens of the axis.

(ECC) Equine Chiropractic Certification Practice Test

(ECC) Equine Chiropractic Certification Practice Test

ECC Equine Anatomy & Physiology 2