Related Experiment Video
Updated: Aug 15, 2026

The Double-H Maze: A Robust Behavioral Test for Learning and Memory in Rodents
Published on: July 8, 2015
Memory for performed actions in dementia of Alzheimer type: further evidence for a global semantic memory deficit
Wolfgang Mack1, Christine Eberle, Lutz Frölich
1Institute of Psychology, Johann Wolfgang von Goethe University, Frankfurt am Main, Germany. mack@psych.uni-frankfurt.de
Abstract:
Findings in patients with dementia of the Alzheimer type (AD patients) concerning the enactment effect, i.e. reaching a better memory performance after encoding actions by performing them in contrast to encoding them by reading, are ambiguous. In order to get more insight into memory deterioration in patients suffering from AD, an experimental study was run. Patients with mild-to-moderate AD (n = 23) and healthy elderly control persons (n = 20) took part. They had to encode actions verbally as well as enactively. Memory performance was tested by using recognition judgments instead of the predominating free recall. The AD patients showed no enactment effect and a rate of false alarm judgments that was more than twice as high as found in healthy elderly controls. This enactive encoding failure may be indicative of memory deficits underlying the conceptual system of action representations.
More Related Videos
11:01Examining the Characteristics of Episodic Memory using Event-related Potentials in Patients with Alzheimer's Disease
Published on: August 30, 2011
06:23The 4 Mountains Test: A Short Test of Spatial Memory with High Sensitivity for the Diagnosis of Pre-dementia Alzheimer's Disease
Published on: October 13, 2016
Related Concept Videos
Role of Hippocampus in Memory
Dementia l: Introduction
Amnesia
The severity and duration of memory loss vary depending on the type and underlying cause. Amnesia is classified into two main types: retrograde and anterograde.
Retrograde amnesia is marked by the loss of memories formed before the onset of the condition. Patients may recall distant past events but often forget those occurring shortly before the incident.
Anterograde...
Role of Cerebellum and Prefrontal Cortex in Memory
Long-Term Memory
Long-term memory can be categorized into two primary types: explicit and implicit memory. Explicit memory, also known as declarative memory, involves the conscious recollection of information that we deliberately try to remember, recall, and articulate. This type of memory encompasses specific facts, events, and...
Dementia
The progression of dementia is generally gradual.