Special Tests of the Lower Extremity

The Thomas test evaluation fexion contracture of the iliopsoas muscle.
The test is performed as follows:
Have the patient upine on the exam table
Flex the hip and knee on the side NOT being tested, and have the patient hold their knee against their chest
The non-flexed leg is examined
A positive test result occurs if this leg raises off the table, indicating a flexion contracture of the iliopsoas muscle.