Comprehensive Osteopathic Medical Licensing Examination (COMLEX USA) Practice

Which Deep Tendon Reflex (DTR) grade indicates a slightly hyperactive response?

1. DTR Grade 1

2. DTR Grade 2

3. DTR Grade 3

4. DTR Grade 4

The correct answer is: DTR Grade 3

A Deep Tendon Reflex (DTR) grade of 3 indicates a slightly hyperactive response, which is characterized by a brisk reflex that is more pronounced than a normal response. In the context of grading DTRs, a grade of 2 is considered normal, with predictable and consistent reflex responses. When considering DTR grade 3, the reflex tends to occur with little to no reinforcement, suggesting an increase in excitability of the reflex arc or central nervous system influences. This grade is significant in clinical practice as it can indicate potential neurological issues, including lesions or irritations along the reflex pathways. Further up the scale, a grade of 4 represents a very brisk response possibly accompanied by clonus, indicating a more considerable hyperactivity that could suggest more severe central nervous system pathology. Understanding these nuances in DTR grading helps clinicians assess and interpret neurological function effectively.