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Related Concept Videos

Higher Mental Functions of Brain: Learning and Memory01:26

Higher Mental Functions of Brain: Learning and Memory

Memory is one of the most vital higher mental functions of the brain. Memory is closely related to learning because it enables us to retain information and experiences from our past to use them in our present life. It also helps us to remember facts, events, and skills, such as riding a bike or swimming. There are two types of memory — declarative memory, which involves memorizing facts or events, and procedural memory, which enables us to remember how to do something like writing or playing an...

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Related Experiment Video

Updated: Jul 3, 2026

Transcranial Direct Current Stimulation (tDCS) of Wernicke's and Broca's Areas in Studies of Language Learning and Word Acquisition
12:49

Transcranial Direct Current Stimulation (tDCS) of Wernicke's and Broca's Areas in Studies of Language Learning and Word Acquisition

Published on: July 13, 2019

Stimulus type affects Wada memory performance.

S Marc Testa1, Julianna Ward, Nathan E Crone

  • 1Department of Psychiatry and Behavioral Sciences, Division of Medical Psychology, The Johns Hopkins University School of Medicine, 600 N. Wolfe Street, Meyer 218, Baltimore, MD 21287, USA.

Epilepsy & Behavior : E&B
|July 22, 2008
PubMed
Summary
This summary is machine-generated.

Recognition memory for objects, words, and faces was assessed in patients with temporal lobe epilepsy (TLE) using the Wada procedure. Findings link memory performance to seizure focus laterality and hemisphere language dominance.

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Last Updated: Jul 3, 2026

Transcranial Direct Current Stimulation (tDCS) of Wernicke's and Broca's Areas in Studies of Language Learning and Word Acquisition
12:49

Transcranial Direct Current Stimulation (tDCS) of Wernicke's and Broca's Areas in Studies of Language Learning and Word Acquisition

Published on: July 13, 2019

A Within-Subject Experimental Design using an Object Location Task in Rats
09:28

A Within-Subject Experimental Design using an Object Location Task in Rats

Published on: May 6, 2021

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurology

Background:

  • The Wada procedure, involving temporary inactivation of one cerebral hemisphere, is crucial for understanding hemispheric functions.
  • Temporal lobe epilepsy (TLE) presents unique challenges for studying memory lateralization due to potential alterations in brain organization.

Purpose of the Study:

  • To investigate how amytal injection side, seizure focus laterality, and stimulus type affect recognition memory.
  • To determine the relationship between memory performance, seizure focus, and language dominance in TLE patients.

Main Methods:

  • The Wada procedure was administered to 35 patients with left temporal lobe epilepsy (LTLE) and 28 patients with right temporal lobe epilepsy (RTLE).
  • Stimuli including real and line-drawn objects, printed words, and faces were presented during cerebral anesthesia.
  • Recognition memory was assessed after anesthetization of either the left or right hemisphere.

Main Results:

  • Recognition of objects was superior after anesthetization of the lesional hemisphere in both LTLE and RTLE groups.
  • Face recognition was impaired in RTLE patients regardless of injection side, and in LTLE patients after right hemisphere injection.
  • Word recognition was impaired in LTLE patients after either injection, and more so after left hemisphere injection in RTLE patients.

Conclusions:

  • Object recognition appears dually encoded, with accuracy dependent on seizure focus laterality.
  • Word and face recognition accuracy is influenced by seizure focus laterality and potentially by the language dominance of the assessed hemisphere.