Thrombosis of the right middle cerebral artery would most likely result in what condition?

Thrombosis of the right middle cerebral artery is likely to lead to left face and arm paralysis due to the contralateral control of motor function in the brain. The middle cerebral artery supplies a significant portion of the lateral surface of the cerebral hemisphere, which includes areas responsible for motor control and sensation of the face and upper limb. Thus, when there is an occlusion in the right middle cerebral artery, the corresponding regions of the left side of the brain, which control movement and sensation on the opposite side of the body, are affected. This phenomenon is known as contralateral hemiparesis, and it commonly manifests as weakness or paralysis on the opposite side.

The left face and arm are typically more affected than the left leg in such cases, as the areas of the brain responsible for these functions are organized in a way that the face and arms are represented in a more lateral position within the motor cortex, while the leg is represented more medially. Therefore, left-sided paralysis is a common clinical finding resulting from right middle cerebral artery thrombosis.