AFC Anatomy & Physiology for Aerial Fitness 3 — Questions and Answers
Question 1: Which nerve is most at risk of compression injury when an aerial student wraps the hoop behind the knee repeatedly?
- Femoral nerve
- Tibial nerve
- Common peroneal (fibular) nerve (Correct answer)
- Obturator nerve
Correct answer: Common peroneal (fibular) nerve
The common peroneal nerve wraps around the fibular head and is superficial, making it highly vulnerable to compression at the back of the knee.
Question 2: During a back bend in aerial silks, which spinal ligament is placed under maximum stretch?
- Posterior longitudinal ligament
- Anterior longitudinal ligament (Correct answer)
- Ligamentum flavum
- Interspinous ligament
Correct answer: Anterior longitudinal ligament
The anterior longitudinal ligament runs along the front of the vertebral bodies and is maximally stretched during spinal extension (back bending).
Question 3: Type I muscle fibers are preferred by aerial artists during long conditioning sessions because they:
- Generate maximal force in a single contraction
- Are fatigue-resistant and rely on oxidative metabolism (Correct answer)
- Hypertrophy rapidly with resistance training
- Contract faster than Type II fibers
Correct answer: Are fatigue-resistant and rely on oxidative metabolism
Type I (slow-twitch) fibers are highly oxidative, rich in mitochondria, and resist fatigue, making them ideal for sustained aerial conditioning work.
Question 4: An aerial student complains of pain and numbness down the medial forearm and into the ring and little fingers. Which nerve is most likely involved?
- Median nerve
- Radial nerve
- Ulnar nerve (Correct answer)
- Musculocutaneous nerve
Correct answer: Ulnar nerve
The ulnar nerve supplies the medial forearm and the 4th and 5th digits; compression at the elbow or wrist produces this pattern.
Question 5: Proprioceptors located within muscles that detect changes in muscle length and velocity are called:
- Golgi tendon organs
- Muscle spindles (Correct answer)
- Meissner's corpuscles
- Pacinian corpuscles
Correct answer: Muscle spindles
Muscle spindles (intrafusal fibers) sense changes in muscle length and rate of stretch, triggering reflexive contractions to protect the muscle.
Question 6: The diaphragm's role during aerial breath control is best described as:
- A passive structure that relaxes during inhalation
- The primary inspiratory muscle that contracts and descends to increase thoracic volume (Correct answer)
- A muscle that only activates during forced exhalation
- A ligament connecting the ribs to the sternum
Correct answer: The primary inspiratory muscle that contracts and descends to increase thoracic volume
During inhalation, the diaphragm contracts and flattens downward, increasing the vertical dimension of the thoracic cavity and drawing air in.
Question 7: Which joint classification best describes the intervertebral joints formed between vertebral bodies?
- Synovial hinge joints
- Symphyses (secondary cartilaginous joints) (Correct answer)
- Synarthrotic fibrous joints
- Pivot joints
Correct answer: Symphyses (secondary cartilaginous joints)
Intervertebral joints between vertebral bodies are symphyses, joined by fibrocartilaginous discs that allow limited movement and absorb compressive load.
AFC Anatomy & Physiology for Aerial Fitness 3
Which nerve is most at risk of compression injury when an aerial student wraps the hoop behind the knee repeatedly?