Anatomy and Kinesiology Flashcards
7 cards from real NCBTMB practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Anatomy and Kinesiology flashcards as text
Which structure forms the floor of the popliteal fossa?
Answer: Popliteus and posterior capsule of the knee
The floor of the popliteal fossa is formed by the popliteal surface of the femur, the posterior knee capsule, and the popliteus muscle.
What is the open-pack (resting) position of the glenohumeral joint?
Answer: 55° abduction and 30° horizontal adduction
The resting (open-pack) position of the glenohumeral joint is approximately 55° of abduction with 30° of horizontal adduction, where the joint capsule is most lax.
The sciatic nerve is formed by contributions from which spinal levels?
Answer: L4–S3
The sciatic nerve is the largest nerve in the body and is formed from spinal levels L4 through S3 via the sacral plexus.
Which anatomical landmark is used to identify the level of the sternal angle (angle of Louis)?
Answer: Rib 2 articulation
The sternal angle (angle of Louis) is the junction of the manubrium and body of the sternum and corresponds to the articulation of the second rib.
Which muscle performs the action of 'unlocking' the fully extended knee to allow flexion to begin?
Answer: Popliteus
The popliteus unlocks the knee from its screwed-home position by internally rotating the tibia on the femur, initiating knee flexion.
Which type of synovial joint allows the greatest range of motion in multiple planes?
Answer: Ball-and-socket joint
Ball-and-socket joints (e.g., hip and shoulder) allow multiaxial movement including flexion, extension, abduction, adduction, rotation, and circumduction.
The anatomical snuffbox is bounded anteriorly by which tendon?
Answer: Abductor pollicis longus and extensor pollicis brevis
The anterior (radial) boundary of the anatomical snuffbox is formed by the tendons of the abductor pollicis longus and extensor pollicis brevis.