Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

A search for the optimal stimulus

M Mennemeier1, S Z Rapcsak, M Dillon

  • 1Department of Physical Medicine and Rehabilitation, University of Alabama, Birmingham, Alabama.

Brain and Cognition
|September 12, 1998
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

How physiotherapists attend to the human aspects of care when working with people with low back pain: a thematic analysis.

Health sociology review : the journal of the Health Section of the Australian Sociological Association·2023
Same author

Uncertainty in low back pain care - insights from an ethnographic study.

Disability and rehabilitation·2022
Same author

Change in EEG Activity is Associated with a Decrease in Tinnitus Awareness after rTMS.

Frontiers in neurology and neuroscience research·2021
Same author

Change in a clinical measure of cervical movement sense following four weeks of kinematic training.

Musculoskeletal science & practice·2020
Same author

Assessing physical activity in people with mental illness: 23-country reliability and validity of the simple physical activity questionnaire (SIMPAQ).

BMC psychiatry·2020
Same author

Knowing about you: eliciting dimensions of personhood within tuberculosis care.

The international journal of tuberculosis and lung disease : the official journal of the International Union against Tuberculosis and Lung Disease·2017
Same journal

Gelastic dysarthria: Speech-triggered pathological laughter with evidence for a selective pontine gating mechanism.

Brain and cognition·2026
Same journal

Brain correlates of linguistic-cognitive stimulation in neurotypical and Atypical older adult populations: A systematic review.

Brain and cognition·2026
Same journal

Effects of Dieting on Neural Encoding of Preferences for Edible and Non-Edible Rewards: An ERP Study.

Brain and cognition·2026
Same journal

Structural complexity of brain regions in mild cognitive impairment and Alzheimer's disease.

Brain and cognition·2026
Same journal

Spatial navigation training enhances performance on large-scale and small-scale spatial tasks through different neural mechanisms.

Brain and cognition·2026
Same journal

Unraveling the link between brain injury and enhanced artistic skills.

Brain and cognition·2026
See all related articles

Stimulus size impacts spatial neglect errors. Right hemisphere lesions worsen errors with larger and smaller stimuli, while left hemisphere lesions affect stimuli smaller than a pivotal value.

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Clinical Neuropsychology

Background:

  • Spatial neglect is a common deficit following brain injury.
  • Understanding factors influencing spatial neglect is crucial for effective rehabilitation.

Purpose of the Study:

  • To investigate the relationship between stimulus size/item number and error magnitude/direction in center estimation and line cancellation tests.
  • To explore how these relationships inform theories of spatial neglect.

Main Methods:

  • Twenty patients with right hemisphere lesions, eleven with left hemisphere lesions, and eleven healthy controls were tested.
  • Multiple versions of center estimation and line cancellation tests varying in stimulus size and item number were administered.

Related Experiment Videos

Main Results:

  • Patients exhibited optimal/pivotal stimulus values influencing error magnitude.
  • Right hemisphere lesions exacerbated errors with stimuli deviating from optimal size; left hemisphere lesions primarily affected smaller stimuli.
  • Normal subjects showed a leftward error shift with decreasing stimulus size (crossover effect), exaggerated by right hemisphere lesions and diminished/reversed by left hemisphere lesions.

Conclusions:

  • Performance on spatial neglect tests is relative to stimulus parameters.
  • Spatial neglect involves overestimation of small and underestimation of large stimuli.
  • The crossover effect is linked to size perception errors, with distinct hemispheric specializations for size estimation.