The trunk, which plays an integral role in postural stabilization, controls extremity movements by providing dynamic stabilization during performance. Trunk stability is thought to be a prerequisite for upper extremity functions and it is assumed that trunk control has an effect on hand functions. There is thought to be a strong relationship between postural control and fine motor functions. There are very few studies in the literature examining the effect of trunk control on hand functions in Parkinson's patients. Based on this, the aim of this study is; To investigate the relationship between trunk control and hand functions. * Hypotheses of the study; * Ho: There is no relationship between Trunk Control and hand functions in individuals with Parkinson's disease. * H1: There is a relationship between Trunk Control and hand functions in individuals with Parkinson's disease