A study by Maranhao, Maranhao-Filho, Lima, and Vincent (2010) studied 13 tests for their ability to detect subtle motor deficits to identify possible unilateral/monohemispheric brain tumors. The results of this study were very interested and provide simple tests with respectable metrics for simple screening of a potentially serious concern.
There are 3 arches of the foot that provide both mobility and stability to ambulate. There are at least 3 tests that can be used to assess varying types of mobility (or lack of mobility) of the ankle and foot: navicular drop, Coleman block, and windlass test.
Read more Arches of the Foot: Challenge of Mobility & Stability
“Many studies of vertebral artery blood flow changes related to cervical spine rotation have been published, but the findings are controversial and the evidence unconvincing.”
When joint hypermobility is bilateral, one needs to explore systemic issues. Connective tissue disorders may be a contributing factor. The Beighton tests can help assess the magnitude of joint laxity.