Participants will be evaluated in terms of inclusion criteria, and fugl-meyer upper extremity performance assessment will be applied to eligible patients and it will be clarified whether they can be included. Participants who may be included in the study will fill in the patient demographic information form prepared by the researchers as a face-to-face interview. This form will take approximately 5 minutes, during which time the muscles will be rested. Then, the viscoelastic properties of the determined muscles of the participants will be evaluated. Finally, the participants will be evaluated in terms of the activation timing and percentages of the muscles determined during an open and closed kinetic chain activity. Half of the participants will do the open kinetic chain activity before the closed kinetic chain activity with a five-minute resting period between activities. The others will start with the closed kinetic chain activity first and then the open kinetic chain activity.

Participants will be evaluated in terms of inclusion criteria. Eligable participants will fill in the patient demographic information form prepared by the researchers as a face-to-face interview. This form will take approximately 5 minutes, during which time the muscles will be rested. Then, the viscoelastic properties of the determined muscles of the participants will be evaluated. Finally, the participants will be evaluated in terms of the activation timing and percentages of the muscles determined during an open and closed kinetic chain activity. Half of the participants will do the open kinetic chain activity before the closed kinetic chain activity with a five-minute resting period between activities. The others will start with the closed kinetic chain activity first and then the open kinetic chain activity.

Noraxon Surface Electromyography System will be used to assess muscle activation timing and percentage of upper, middle and lower trapezius, serratus anterior, infraspinatus, levator scapulae of all participants. The placement of electrodes will be done according to SENIAM's European Recommendations for Surface Electromyography. Synchronized video capture will be used to determine the phases of the scapular motion during the open and closed kinetic chain exercises (OKC and CKC, respectively). To take the measurement during OKC, participants will be seated in a chair that will support the waist and back, with the feet in contact with the ground. They will be asked to cross the fingers of both hands and to raise both arms overhead as high as they can. For CKC, they will be asked to stand next to a table at level of SIAS and place their forearms on table with the elbows flexed. They will be asked to extend the elbow of the non-measuring arm while shifting body weight to the other side.

Myoton®PRO Digital Palpation Device will be used to measure the muscle tone, stiffness, and elasticity of muscles below. The patient will be seated with the flexed elbow supported by a pillow next to the body. Measurements will be repeated 3 times.

• Upper Trapezius: the end-points of a line connecting the spinous process of C7 and the acromion, distally, from the mid-point of the muscle belly
• Middle Trapezius: the mid-point of a line connecting T4 spinous process to the medial border of spina scapula
• Lower Trapezius: The mid-point of a line connecting the spinous process of T6 to the medial border of spina scapula
• Serratus anterior: a- Over the fourth rib, at the midpoint between the latissimus dorsi and the pectoralis major; b- Over the seventh rib, in the midline of the axilla
• Infraspinatus: Two fingers breadth below the center spine of the scapula
• Levator Scapulae: Between the posterior margin of SCM and anterior margin of the UT, at level of C4/5

The Fugl-Meyer Assessment (FMA) is a stroke-specific, performance-based impairment index. It is designed to assess motor functioning, balance, sensation and joint functioning in patients with post-stroke hemiplegia. It will be used for the participants only with hemiplegia.