STROKE · ATTENTION & RECOVERY
The food never disappeared.
A half-finished meal can reveal a change in the brain’s ability to notice. A remarkable experiment in Milan helps explain why—and changes how families can help.
Dr. Shailesh Male
Board-certified in neurology and vascular neurology. Practicing neurointerventionalist.
Adjunct Assistant Professor, Brody School of Medicine.
Key takeaways
- Spatial neglect is difficulty noticing one side of the body or surrounding space after a brain injury. It is often left-sided after a right-brain stroke.
- It differs from losing part of the visual field, although the two problems can occur together.
- One-sided mistakes deserve assessment and a shared rehabilitation plan, rather than an assumption that the person is being careless.
On this page
What changes in spatial neglect?
Picture a person who has eaten the food on the right of a plate and left the food on the left untouched. Asked whether anything remains, they may say the plate is empty. At another point in the day, they might leave one sleeve hanging or shave only half their face.
After a stroke, this pattern can reflect spatial neglect: the brain is failing to attend to part of the person’s body or world. The word “neglect” describes the neurological problem. It does not mean the person is choosing to ignore you. [1]
Losing half the visual field is called hemianopia. Neglect concerns attention and awareness. They are different problems, and they can coexist. The pattern needs clinical assessment; a half-finished plate alone cannot settle the diagnosis. [2]
The experiment in Milan
In 1978, researchers Edoardo Bisiach and Claudio Luzzatti asked two patients with left-sided neglect to imagine familiar places. The best-known example involved Milan’s Piazza del Duomo. Eyesight could not explain everything, because the scene was being constructed in imagination. [3]
First, the patients imagined standing at the far end of the square, facing the cathedral. Descriptions favored landmarks on their imagined right. Then the researchers changed the viewpoint: stand on the cathedral steps and look back across the square.
Previously omitted landmarks could now enter the description because they lay on the person’s new right. The buildings had not moved. The change challenged the idea that those landmark memories had simply been erased. It did not establish that every aspect of memory was normal.
1 · Facing the cathedral
2 · Facing back across the square
The brain’s spotlight
Attention is like a spotlight: information can be present without becoming something the brain notices. That spotlight can operate across the body, a room, or an imagined scene.
The leading explanation used in the video is an asymmetry in the attention system: the left hemisphere directs attention mostly to the right, while the right hemisphere has broader coverage. Damage on the right can therefore leave left-sided space at a particular disadvantage. This is a simplified model; attention involves interacting networks, and their activity changes with the task. [4]
Why a reminder may not work
“There is still food right here” sounds like a helpful correction. But a person with neglect may not experience the missing information as a gap that needs checking. Some also have anosognosia—difficulty recognizing a neurological problem. The absence of that awareness can make reminders feel unnecessary or confusing. [5]
The family may see stubbornness. The rehabilitation team may see a problem with noticing and awareness. Understanding the difference changes the conversation from blame to a practical question: what cue helps this person find what they are missing?
What helping can look like
For someone with established neglect, a rehabilitation team may suggest changing the setup. Turning a plate can bring untouched food into the side of space the person is noticing more readily. It changes access to the food; it does not repair the injury.
Therapists also work on scanning toward the neglected side. A colored line at the edge of a page can provide a target to keep searching for. The exact cue, its placement, and how to practice should follow the person’s rehabilitation plan. Scanning is one approach; no cue works for everyone. [6]
For many people, neglect tends to improve over time after a stroke, especially with therapy. Recovery varies, and persistent difficulties can still affect everyday activities. A change on a paper task is not the same as safe, independent performance in daily life. [6]
A useful note for the rehabilitation team
For an ongoing pattern the team is already assessing, bring a short description of an actual activity. This helps make the conversation specific:
- The activity: Was it eating, dressing, reading, or walking?
- The side: What was missed, and where was it relative to the person?
- The cue: What did you say or change, and what happened next?
- The plan: Ask the therapist to demonstrate the cue the whole family should use.
If the change is new and sudden, seek emergency help rather than waiting to collect observations. For an established problem, the goal is a consistent, individualized way to help the person bring more of the world into view.
Sources
- American Stroke Association: Spatial neglect
- American Stroke Association: Vision changes after stroke
- Bisiach E, Luzzatti C. Unilateral neglect of representational space. Cortex. 1978;14:129–133.
- Sommer WH et al. Dynamic spatial coding during a visual search task. PLOS ONE. 2008;3:e3167.
- Cleveland Clinic: Anosognosia
- Canadian Stroke Best Practices: Visual and visual-perceptual impairment
- American Stroke Association: Stroke symptoms and warning signs