COF Human Anatomy & Physiology 4

Question 1

Which ligament of the ankle is most commonly injured in an inversion sprain?

Accepted Answer

Anterior talofibular ligament

Answer

The anterior talofibular ligament (ATFL) is the weakest and most commonly torn ankle ligament in inversion injuries.

Question 2

The sciatic nerve exits the pelvis through which opening?

Accepted Answer

Greater sciatic foramen

Answer

The sciatic nerve exits the pelvis through the greater sciatic foramen, typically below the piriformis muscle, before coursing down the posterior thigh.

Question 3

In closed kinetic chain mechanics, subtalar joint pronation during midstance causes which obligatory tibial motion?

Accepted Answer

Internal rotation

Answer

Subtalar pronation in a closed kinetic chain obligates tibial internal rotation due to the triplanar coupling of the oblique subtalar joint axis.

Question 4

Which condition describes an abnormal lateral curvature of the spine in the coronal plane, often requiring a TLSO orthosis for management?

Accepted Answer

Scoliosis

Answer

Scoliosis is a lateral curvature of the spine in the coronal plane; a TLSO (thoracolumbosacral orthosis) like the Boston brace is commonly used for adolescent idiopathic scoliosis.

Question 5

The brachial plexus originates from which spinal nerve roots?

Accepted Answer

C5-T1

Answer

The brachial plexus arises from ventral rami of C5 through T1 nerve roots, supplying all motor and sensory innervation to the upper extremity.

(COF) Certified Orthotic Fitter Practice Test

(COF) Certified Orthotic Fitter Practice Test

COF Human Anatomy & Physiology 4