A convenient sample of children with spastic hemiparetic CP of both genders will participate in this study. To avoid type II error, sample size calculation was performed prior to the study, based on data of pilot study, using G*POWER statistical software (version 3.1.9.2; Franz Faul, Universitat Kiel, Germany) [Exact tests- correlational study, α=0.05, β=0.2, and effect size = 0.4] and revealed that the appropriate sample size for this study is N=46.

It will be used to assess selective voluntary motor control. It is a reliable and valid evaluation tool used to quantify and describe selective voluntary motor control in children with spastic cerebral palsy. The goal of the assessment is to systematically evaluate a person's ability to move the upper extremity with selective voluntary motor control by observing movement control, coordination, fluency, mirroring, and speed at each joint, and then assigning a grade, all in 'real time. Clinically this measure may guide the selection of medical, surgical, or therapy interventions and may improve outcome prognosis after brief training. Raters demonstrated excellent reliability in assessing upper extremity SVMC in a group of children with hemiplegic, diplegic, and quadriplegic CP using the Ttest of arm selective control

The goal of the assessment is to systematically evaluate a person's ability to move the upper extremity with selective voluntary motor control by observing movement control, coordination, fluency, mirroring, and speed at each joint, and then assigning a grade. Each joint is scored as a 0, 1, or 2. The joints of the affected limb are summed for a limb score for a total score. The maximum score is 16 per side, or 32 points in total (in hemiplegia assess the affected side only) with higher score indicates better performance. Admiration of the teat items and scoring will be conducted according to the scale user instructions.

to evaluate hand grip strength

to assess upper limb function