Medicine and Health Sciences Commons^™

Glutamate Receptors In Perirhinal Cortex Mediate Encoding, Retrieval, And Consolidation Of Object Recognition Memory., Boyer D Winters, Timothy J Bussey

Brain and Mind Institute Researchers' Publications

Object recognition is consistently impaired in human amnesia and animal models thereof. Results from subjects with permanent brain damage have revealed the importance of the perirhinal cortex to object recognition memory. Here, we report evidence from rats for interdependent but distinct stages in object recognition memory (encoding, retrieval, and consolidation), which require glutamate receptor activity within perirhinal cortex. Transient blockade of AMPA receptor-mediated synaptic transmission within perirhinal cortex disrupted encoding for short- and long-term memory as well as retrieval and consolidation. In contrast, transient NMDA receptor blockade during encoding affected only long-term object recognition memory; NMDA receptor activity was also …

Investigating The Effects Of Communication Problems On Caregiver Burden, Marie Savundranayagam, M. Hummert, R. Montgomery

Marie Y Savundranayagam

Objectives. The goal of this study was to explore the relationship between communication problems associated with dementia and caregiver burden, within the context of problem behaviors and cognitive and functional abilities of the care recipient.

Methods. A scale on communication problems associated with dementia was developed and administered to 89 family caregivers. Participants also completed measures of care-recipient cognitive and functional status, problem behavior, and caregiver burden (demand, stress, and objective burden).

Results. Analyses using structural equation modeling showed that care-recipient cognitive and functional status indirectly predicted problem behaviors via communication problems. The status indicators also directly predicted demand burden. …