The hippocampus and semantic memory over time.

We previously reported impoverished semantic memory in patients with hippocampal amnesia (Klooster & Duff, 2015). Here, we test whether this disruption results from the patients not updating semantic representations since the onset of their amnesia. We extend previous work by comparing performance of hippocampal patients and their current age (CA) comparisons (M = 58.

Procedural Memory Following Moderate-Severe Traumatic Brain Injury: Group Performance and Individual Differences on the Rotary Pursuit Task.

The impact of traumatic brain injury (TBI) on procedural memory has received significantly less attention than declarative memory. Although to date studies on procedural memory have yielded mixed findings, many rehabilitation protocols (e.g.

Remote semantic memory is impoverished in hippocampal amnesia.

The necessity of the hippocampus for acquiring new semantic concepts is a topic of considerable debate. However, it is generally accepted that any role the hippocampus plays in semantic memory is time limited and that previously acquired information becomes independent of the hippocampus over time. This view, along with intact naming and word-definition matching performance in amnesia, has led to the notion that remote semantic memory is intact in patients with hippocampal amnesia.

Gestures make memories, but what kind? Patients with impaired procedural memory display disruptions in gesture production and comprehension.

Hand gesture, a ubiquitous feature of human interaction, facilitates communication. Gesture also facilitates new learning, benefiting speakers and listeners alike. Thus, gestures must impact cognition beyond simply supporting the expression of already-formed ideas.