Reconsolidation Reconsidered

Some of the considerations that led to a consolidation interpretation of retrograde amnesia (RA), which states that RA results from the disruption of memory processing and storage when neural activity is interrupted by a brain insult, are reviewed here. The time-dependent gradient of memory loss (i.e., new memories are more vulnerable to amnesia than old memories) that characterizes RA seemed to fit nicely with the notion of a cascade of cellular events occurring during the immediate post-acquisition period that would transform a labile representation into a more stable form (i.e., consolidate the memory). However, a variety of observations came to challenge the storage-disruption model, and among these was the finding of amnesia for old but reactivated memories. A recent study by Nader, Schafe, and LeDoux (2000) provides an important analytic extension of the work on "reconsolidation" by showing that inhibition of protein synthesis in the lateral and basal nuclei of the amygdala immediately following the reactivation of old memory will induce retrograde amnesia. We offer a retrieval-oriented conceptualization to account for the temporal gradient and the "reconsolidation" phenomena.     

Anonymity reconsidered

This paper questions the concept of the therapist's anonymity and offers as an alternative the concept of an anonymity/self-disclosure dimension along which the therapist can position himself depending on several criteria. These criteria pertain both to characteristics of the therapist, the patient, and the material to be disclosed.     

Nostalgia reconsidered

Nostalgia is standardly assumed to be directed towards the past, to involve some salient feeling of the irretrievability of the past, and to be directed towards the memory of an event. In this paper I argue that none of these standard assumptions hold. I use a time-traveller example to demonstrate that nostalgia is not essentially past-directed. Once nostalgia is prised from the objective past, we can examine the other purported conditions, making space for the conclusion that the felt irretrievability of the past is not the necessary feature of nostalgia that we assumed it to be. I then argue that the notion that nostalgia is directed towards the memory of an event is misguided. Finally, I distinguish two routes to nostalgia and, with this distinction in place, argue that nostalgia is neither essentially time nor place directed. Nostalgia is simply change-directed.     

Representation-hunger reconsidered

According to a standard representationalist view cognitive capacities depend on internal content-carrying states. Recent alternatives to this view have been met with the reaction that they have, at best, limited scope, because a large range of cognitive phenomena—those involving absent and abstract features—require representational explanations. Here we challenge the idea that the consideration of cognition regarding the absent and the abstract can move the debate about representationalism along. Whether or not cognition involving the absent and the abstract requires the positing of representations depends upon whether more basic forms of cognition require the positing of representations.     

Congruence reconsidered

Carl Rogers' definitions of congruence are discussed. Four specific requirements are identified for the concept and practice of therapeutic congruence. Drawing on examples from practice, the interface between congruence and the other necessary and sufficient conditions of change is examined.     

Mindfulness reconsidered

Mindfulness has recently become a popular addition to the range of methods available to counsellors and psychotherapists, especially in the field of stress reduction but is the method being over-sold? This article reviews the origins of mindfulness, attempts a balanced review of what mindfulness is and is not good for, looks at the question of whether the meaning of the term has mutated or suffered dilution as its popularity has grown and considers what that popularity and possible mutation tell us about the current state of thinking in the psychotherapy field. In the process, it puts the usefulness and nature of mindfulness in a new perspective, challenging a number of commonly held contemporary views on the subject.     

Sabellianism reconsidered

Sabellianism, the doctrine that the Persons of the Trinity are roles that a single divine being plays either simultaneously or successively, is commonly thought to entail that the Father is the Son. I argue that there is at least one version of Sabellianism that does not have this result and meets the requirements for a minimally decent doctrine of the Trinity insofar as it affirms that each Person of the Trinity is God and that the Trinity of Persons is God while maintaining monotheism without undermining the distinctness of Persons. I am grateful for comments by participants at the Society of Christian Philosophers 2000 meeting and University of San Diego Philosophy colloquium at which earlier versions of this paper were read, and by anonymous referees for this journal.     

Reconsolidation of declarative memory in humans

The reconsolidation hypothesis states that a consolidated memory could again become unstable and susceptible to facilitation or impairment for a discrete period of time after a reminder presentation. The phenomenon has been demonstrated in very diverse species and types of memory, including the human procedural memory of a motor skill task but not the human declarative one. Here we provide evidence for both consolidation and reconsolidation in a paired-associate learning (i.e., learning an association between a cue syllable and the respective response syllable). Subjects were given two training sessions with a 24-h interval on distinct verbal material, and afterward, they received at testing two successive retrievals corresponding to the first and second learning, respectively. Two main results are noted. First, the first acquired memory was impaired when a reminder was presented 5 min before the second training (reconsolidation), and also when the second training was given 5 min instead of 24 h after the first one (consolidation). Second, the first retrieval proved to influence negatively on the later one (the retrieval-induced forgetting [RIF] effect), and we used the absence of this RIF effect as a very indicator of the target memory impairment. We consider the demonstration of reconsolidation in human declarative memory as backing the universality of this phenomenon and having potential clinical relevance. On the other hand, we discuss the possibility of using the human declarative memory as a model to address several key topics of the reconsolidation hypothesis.     

Sensory storage reconsidered

Memory & Cognition - Models of sensory storage appear to incorporate three features: capacity in excess of short-term memory, rapid decay of information, and an unprocessed trace as the storage...     

Reconsolidation and memory infidelity in Lymnaea

Lymnaea stagnalis were operantly conditioned to not perform aerial respiratory behaviour in a specific context (i.e. context-1). The memory for this learned response was reactivated 3 days later in context-1. During the 1 h reconsolidation period following memory reactivation, randomly picked snails were either maintained in context-1 or exposed to a new context (i.e. context-2). One hour later in the post-reconsolidation period, snails in context-1 were placed for 1 h in context-2 and vice-versa. In neither the hypoxic reconsolidation nor the post reconsolidation periods did snails receive a reinforcing stimulus when they opened their pneumostome. All snails were blindly tested for memory 24 h later period in context-2. Only those snails that had been exposed to context-2 during the reconsolidation period exhibited 'memory' for context-2. That is, memory infidelity was observed. Snails exposed to context-2 in only the post-reconsolidation period did not show memory for context-2. The immediate cooling of snails after their exposure to the new context in the reconsolidation period blocked the formation the implanted memory. Snails trained in context-1 and exposed to context-2 in the consolidation period only, also did not have memory for context-2. However, the memory for context-1 could still be recalled following successful implantation of the 'new' memory. All data presented here are consistent with the notion that during the reconsolidation process memory can be updated.