Recognition and mental manipulation of body parts dissociate in locked-in syndrome

Several lines of evidence demonstrate that the motor system is involved in motor simulation of actions, but some uncertainty exists about the consequences of lesions of descending motor pathways on mental imagery tasks. Moreover, recent findings suggest that the motor system could also have a role in recognition of body parts. To address these issues in the present study we assessed patients with a complete damage of descending motor pathways (locked-in syndrome, LIS) on the hand laterality task, requiring subjects to decide whether a hand stimulus in a given spatial orientation represents a left or a right hand. LIS patients were less accurate than healthy controls in judging hand laterality; more importantly, LIS patients’ performance was modulated by spatial orientation of hand stimuli whereas it was not affected by biomechanical constraints. These findings demonstrate a dissociation between spared hand recognition and impaired access to action simulation processes in LIS patients.     

Some thoughts between body and mind in the light of Wilma Bucci's multiple code theory

The author proposes the usefulness of Wilma Bucci's Multiple Code Theory in clarifying some controversial issues in psychoanalytically inspired psychosomatics. Definition of a dialectic among different entities may appear difficult in an unitarian view of the organism, where body and mind are seen as having no kind of intrinsic existence, which may be differentiated from the organism as a whole, but as two categories having to do with the perspective of the observer. This aporia may find a solution in a redefinition of the body-mind relationship as that between symbolic systems and the subsymbolic system, both of which may be viewed as mind or as body depending on the point of observation. Similarly, somatic pathology, if we accept an unitary paradigm, need no longer be viewed as due to an influence of 'mind' on 'body': a definition of pathology as linked to a disconnection between different systems, as found in Bucci's theory, is proposed as a possible solution. Emergence of somatic symptoms, however, besides being witness to disconnection, may be seen as the subsymbolic first expression of an item of content, an attempt at reconnection, as already proposed, in a way, by Winnicott in 1949. This attempt has much better opportunities to succeed when it finds an adequate container, as in analysis. A clinical situation of this kind is presented.     

On the automatic evaluation of social exemplars

The present article focuses on the automatic evaluation of exemplars whose category membership has been learned in the past. Studies 1 and 2 confirmed the hypothesis that once an exemplar has been encoded as a member of a given group, at a later encounter the evaluation associated with the group will be unintentionally retrieved from memory, even when no perceptual cue indicates the exemplar's category membership. Study 3 extended the results to the domain of in-group/out-group differentiation. In addition. Studies 4 and 5 confirmed the hypothesis that stored evaluations can be retrieved and affect responses even when the semantic information on which the evaluations were originally based is no longer available for retrieval. Finally, Study 6 investigated spontaneous approach-avoidance behavior tendencies. Overall, results demonstrate the pervasive effects of person-based representations, and they are discussed in terms of recent models of person perception and out-group discrimination.     

Gender and lexical access in Italian

Two new procedures were employed to investigate the effects of semantic and grammatical gender on lexical access in Italian and to investigate the interaction of gender with other factors that are known to influence lexical access in other languages. The gender-monitoring task requires a conscious decision about the gender of each noun, whereas the word repetition task does not require explicit attention to gender. In both tasks, single words are presented out of context, under speeded conditions. Both procedures proved to be sensitive indices of word recognition, with reaction times that are closely tied to the point at which words can be uniquely identified (although some processing before and after the uniqueness point was seen). In both tasks, reaction times were strongly affected by phonological factors (e.g., length, number of syllables, and presence of frication on the initial consonant). Phonological transparency of gender marking had a reliable effect on gender monitoring but had no effect on word repetition, suggesting that explicit attention to gender may be a factor affecting utilization of this phonological cue. Semantic factors (including semantic gender) had no effect on performance. Frequency and age of acquisition had very small effects when other factors were controlled. Implications for current models of lexical access are discussed, with special reference to the role of gender.