ABFAS Surgical Anatomy and Biomechanics Flashcards
6 cards from real ABFAS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 ABFAS Surgical Anatomy and Biomechanics flashcards as text
Which tarsal bone serves as the keystone of the medial longitudinal arch?
Answer: Talus
The talus is considered the keystone of the medial longitudinal arch because it transmits body weight from the tibia to the foot.
The Achilles tendon inserts on which surface of the calcaneus?
Answer: Posterior surface
The Achilles tendon inserts on the posterior surface of the calcaneal tuberosity, serving as the primary plantarflexor attachment.
In normal gait, which phase involves the greatest load on the forefoot?
Answer: Terminal stance and pre-swing
Terminal stance and pre-swing involve the greatest forefoot loading as the heel rises and body weight transfers anteriorly through the metatarsal heads.
Which nerve provides sensory innervation to the first web space of the foot?
Answer: Deep peroneal nerve
The deep peroneal nerve provides sensory innervation to the first dorsal web space between the hallux and second toe.
The spring ligament (plantar calcaneonavicular ligament) primarily supports which structure?
Answer: Head of the talus
The spring ligament acts as a sling supporting the head of the talus and is critical to maintaining the medial longitudinal arch.
Which muscle is the primary invertor of the subtalar joint?
Answer: Tibialis posterior
Tibialis posterior is the primary invertor of the subtalar joint and plays a central role in dynamic arch support during gait.