SCS Anatomy & Biomechanics 3

Question 1

Which nerve innervates the tibialis anterior and is vulnerable to traction injury during severe ankle inversion sprains?

Accepted Answer

Deep peroneal nerve

Answer

The deep peroneal nerve innervates the tibialis anterior and is susceptible to traction injury during severe ankle inversion.

Question 2

The force couple producing scapular upward rotation involves which three muscles?

Accepted Answer

Upper trapezius, lower trapezius, and serratus anterior

Answer

Scapular upward rotation is produced by a three-muscle force couple: upper trapezius, lower trapezius, and serratus anterior.

Question 3

Patellofemoral joint reaction forces are greatest during which activity?

Accepted Answer

Deep squatting

Answer

Deep squatting generates the highest patellofemoral joint reaction forces because the compressive load increases exponentially with knee flexion angle.

Question 4

The Lisfranc joint complex consists of the articulation between which structures?

Accepted Answer

Cuneiforms and cuboid with metatarsal bases

Answer

The Lisfranc joint complex includes the tarsometatarsal articulations between the cuneiforms/cuboid and the bases of the five metatarsals.

Question 5

Plantar flexion during heel rise represents which class of lever system?

Accepted Answer

Second-class lever

Answer

Heel rise is a second-class lever with the fulcrum at the metatarsal heads, the load (body weight) between the fulcrum and the gastrocnemius/soleus effort at the calcaneus.

(SCS) Sports Clinical Specialist Practice Test

(SCS) Sports Clinical Specialist Practice Test

SCS Anatomy & Biomechanics 3