Final answer:
The most sensitive exam for determining the amount of lunate collapse is typically an MRI, which can assess the integrity of the bones and soft tissues in the wrist.
Step-by-step explanation:
The question concerns the most sensitive exam for determining the amount of lunate collapse, which is a medical condition related to the wrist. The lunate is one of the eight small bones that make up the carpal bones of the wrist, and its collapse can lead to pain, decreased wrist motion, and eventual arthritis. No explicit exam is mentioned in the information provided to determine the amount of lunate collapse; however, usually, magnetic resonance imaging (MRI) is considered sensitive for assessing the integrity of bones and soft tissues, including the presence of any collapse or abnormality in the lunate. An MRI would be able to reveal the extent of lunate collapse, changes in bone density, and any associated features such as inflammation or alignment issues. X-rays could also be used but might not provide as much detail as an MRI. The details provided in the question info appear to relate more to neurological examinations, specifically those assessing cerebellar function, rather than an orthopedic assessment of the lunate, and thus are not directly relevant to determining lunate collapse.