Identify the cerebral artery territory involved in Man-in-a-barrel syndrome and describe the characteristic clinical presentation.

Man-in-a-barrel syndrome is typically associated with bilateral watershed infarcts between the anterior cerebral artery (ACA) and middle cerebral artery (MCA) territories. Key diagnostic features include proximal weakness of the upper limbs with relative sparing of the lower limbs, resembling a person trapped in a barrel. Clinically, it is crucial to differentiate this from central cord syndrome, which can present similarly but is due to cervical spinal cord pathology. Imaging with MRI can help confirm watershed infarcts and rule out other causes.