GRAViceptive NEGlect Treatment in Acute Stroke Using Targeted Cranial ELECTrotherapy

We aim to determine if targeted high-definition transcranial direct current stimulation (HD-tDCS) can safely correct errors in visual verticality perception in patients after stroke affecting either hemisphere.

Inclusion Criteria: * Supratentorial ischemic stroke diagnosed by neuroimaging and clinical analysis; * Clinically stable (stable vital signs for 24 hours; no chest pain in the last 24 hours; no significant arrhythmia; no evidence of deep vein thrombosis); * Normal or corrected-to-normal vision; * No previous experience with HD-tDCS; * Ability to provide informed consent (patient or legal representative); * Ability to comply with the intervention and assessment schedule of the protocol. * Presence of visual verticality misperception. Exclusion Criteria: * Migraine; * Pregnancy; * Pacemakers; * Seizures; * Claustrophobia; * Transient ischemic attack; * Other neurological disorders; * Psychiatric disorders; * Sensitive scalp or prior brain surgery; * Diagnosis of severe carotid atherosclerotic disease (stenosis ≥ 70%); * Presence of metal implants, cardiac pacemakers, or claustrophobia; * Diagnosis of COVID-19 or other infectious disease that requires isolation; * Uncontrolled medical problems, such as terminal cancer or kidney disease. * Left-handed or mixed-handed individuals as determined using the Edinburgh Handedness Inventory (Appendix 10); * Peripheral vestibular deficits observed using neuro-otological screening tests when the participant's clinical condition allows (head shake test, head thrust test, Dix-Hallpike, and Pagnini-McClure); * Prior musculoskeletal disorders affecting alignment and postural balance (e.g., moderate to severe scoliosis; torticollis); * Cognitive dysfunction outside normal limits on the Mini-Mental State Examination (score below 23); * Global or Wernicke's aphasia;