Stroke Patients Lose Awareness of Half Their World

Hemispatial neglect causes the brain to ignore half of reality, leading to confusion and isolation.

Apr. 3, 2026 at 7:38pm

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A minimalist illustration in neon lines depicting the internal structures of the brain, conceptually representing the neurological condition of hemispatial neglect where the brain ignores half of a person's reality.Hemispatial neglect reveals how the brain constructs our reality, with half the world disappearing from consciousness.Columbus Today

Hemispatial neglect is a neurological condition that can occur after a stroke, where the brain stops processing half of a person's entire reality. Patients may ignore the left side of their body or environment, unable to see or recognize objects on that side. This happens because the right hemisphere of the brain plays a lead role in managing our attention to the world. Hemispatial neglect is fairly common, seen in 43% of acute right hemispheric stroke patients and 20% of left hemispheric stroke patients.

Why it matters

Hemispatial neglect can have significant impacts on a patient's daily life, leading to memory distortion, visual impairment, and difficulty with basic tasks like reading, writing, dressing, eating, and navigating. It also creates social consequences, as patients may ignore their affected side, leading to misunderstanding and isolation from loved ones. Understanding this condition is important for providing effective rehabilitation and helping patients regain awareness and function.

The details

Hemispatial neglect can manifest in two ways: egocentric neglect, where the patient is unable to attend to the left side of their own body, and allocentric neglect, where the patient neglects one half of their external environment. Diagnosis often relies on specialized neurological exams, such as asking patients to draw a clock face or assess tactile and visual stimuli. Patients are often initially unaware of their condition due to the specific brain impairments involved. Rehabilitation focused on strengthening compensatory strategies, like intentional gaze shifts, can help patients regain awareness and function.

  • Hemispatial neglect is seen in 43% of acute right hemispheric stroke patients and 20% of left hemispheric stroke patients.

The players

Kun He Lee, MD

A neurologist at Temple Health and assistant professor of clinical neurology at the Lewis Katz School of Medicine at Temple University.

Jan Bittar, MD

An assistant professor of neurology at The Ohio State University Wexner Medical Center.

Blake Buletko, MD

A vascular neurologist with Cleveland Clinic.

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What they’re saying

“Hemispatial neglect is a condition where a patient loses the ability to notice or react to things on one side of their world—usually the left.”

— Kun He Lee, MD, Neurologist

“Tactile neglect is seen when a patient is unable to feel their left limb upon simultaneous touch of both left and right limbs.”

— Kun He Lee, MD, Neurologist

“Visual neglect is seen when a patient is unable to detect an object in their left visual field when an object is shown in both left and right visual fields.”

— Kun He Lee, MD, Neurologist

“This creates a lot of frustration and disappointment to their loved ones who were at their bedside during my evaluation. As a result, I have seen social consequences when they ignore their affected side, leading to misunderstanding and isolation.”

— Jan Bittar, MD, Assistant Professor of Neurology

“The role of rehabilitation is essential here, as the therapists try to strengthen these compensatory strategies—place the objects intentionally on the neglected side, approach the patient from that side, turn the head more toward the neglected side, etc.”

— Jan Bittar, MD, Assistant Professor of Neurology

What’s next

Through targeted rehabilitation, patients can learn to bridge the gap between what their brains ignore and what actually exists. Ultimately, hemispatial neglect is a reminder that brains don't just see the world—they construct it.

The takeaway

Hemispatial neglect is a debilitating neurological condition that can significantly impact a stroke patient's daily life, leading to confusion, isolation, and difficulty with basic tasks. Understanding this condition and providing effective rehabilitation is crucial for helping patients regain awareness and function.