tesi LIS

[Anandamyde]

finalmente ho fatto richiesta di tesi pure io...il problema è che non so bene come "restringere" il campo di interesse

l'idea è quella di fare una tesi compilativa sulle differenze corticali tra soggetti sordi che "parlano con le mani e ascoltano con gli occhi" e soggetti sani...un po' vaga come idea...un po' troppo...

sto facendo un po' di ricerca bibliografica per avere delle info generali ma il materiale che ho trovato è per lo più incentrato sull'apprendimento della LIS..e non dice molto a livello di modificazioni corticali...

avrei bisogno di un po' di aiuto per cercare di orientare la tesi in un senso preciso...visto che il relatore è prof di "fondamenti anatomo fisiologici dell'attività psichica"...su che base posso orientarmi per fare qualcosa di interessante e inerente alla materia trattata?...e dove posso trovare un po' di bibliografia utile?

mammamiache3adconfuso ...sorry...

grazie a tutti..

[Calethiel]

Non mi sembra vaga come idea, anzi!
Prova a guardare questi articoli se possono interessarti.
Hand and Mouth: Cortical Correlates of Lexical Pro...[J Cogn Neurosci. 2008] - PubMed Result
Neuroplasticity of sign language: implications fro...[Restor Neurol Neurosci. 2007] - PubMed Result
Neural correlates of human action observation in h...[Brain Res. 2007] - PubMed Result

Per curiosità...dove stai facendo la tesi?

[Anandamyde]

grazie mille per l'aiuto...domani darò sicuramente un'occhiata con più calma!

io sono una "reduce" del v.o. di clinica e comunità, sto facendo la tesi a firenze

[eulaliamarsy]

Io mi sono appena laureata con una tesi sullo sviluppo del linguaggio e ho trattato anche ASL e l'attivazione corticale:Ecco qualche articolo: Newman A.J., bavelier D. et al. A critical period for right hemisphere recruitment in American Sign Language processing. Nature 2001;Neville H.J. et al. 1998. Cerebral organization for language in deaf and hearing subjects: biological constraints and effect of experience.- Bavelier D. et al.1998.Hemispheric specialization for english and ASL: left invariance-right variability.Ciao,buon lavoro!

[Anandamyde]

grazie mille

ho dato un'occhiata ed è tutto molto interessante... certo che di bibliografia ce n'è veramente tanta sull'argomento...pensavo di non riuscire a trovare niente...e invece...

posso chiedere un altro aiuto?

voi come impostereste la "struttura" della tesi?

dovrei fare una parte introduttiva dove spiego la fisiologia dell'udito partendo dall'orecchio esterno fino ad arrivare alle strutture corticali, un'analisi storica della LIS e poi concludere con le differenze corticali tra soggetti o cosa?

come la potrei impostare la tesi? la prof mi ha dato carta bianca...ma io sono un po' confusa...non vorrei ridurmi al semplice "copia incolla" nozionistico tipo relazione da 3° media...non potendo fare una tesi sperimentale non potrò proporre e confutare grandi teorie...vorrei comunque riuscire a fare un lavoro "snello" e ben articolato...

[k@tionzis]

ciao!
vedi se puoi trovare qualcosa di utile in questa tesi di scienze del linguaggio
The Grammar of Italian Sign Language - Grammatica della LIS

anche io spero di poter fare una tesi di neuropsicologia( magari sperimentale..) che riguardi la lis, ieri ho pure fatto selezione per un corso lis..speriamo bene!
in bocca al lupo, e quando avrai la tesi pronta potrei darci un'occhiata?

[willy61]

'Visual Memory for Shapes in Deaf Signers and Nonsigners and in Hearing Signers and Nonsigners: Atypical Lateralization and Enhancement': Correction. Cattani, Allegra; Clibbens, John; Perfect, Timothy J.; Neuropsychology, Vol 21(3), May 2007. pp. 399. [Erratum/Correction] Correction to: Visual Memory for Shapes in Deaf Signers and Nonsigners and in Hearing Signers and Nonsigners: Atypical Lateralization and Enhancement Abstract: Reports an error in "Visual Memory for Shapes in Deaf Signers and Nonsigners and in Hearing Signers and Nonsigners: Atypical Lateralization and Enhancement" by Allegra Cattani, John Clibbens and Timothy J. Perfect (Neuropsychology, 2007[Jan], Vol 21[1], 114-121). Figure 1 on p. 117 (Stimulus Materials section) depicting sample and match stimuli was incorrect. The labels Object condition and Shape condition should be reversed so that the top row is indicated as the shape condition and the bottom row as the object condition. (The following abstract of the original article appeared in record 2006-23022-010.) Deaf and hearing individuals who either used sign language (signers) or not (nonsigners) were tested on visual memory for objects and shapes that were difficult to describe verbally with a same/different matching paradigm. The use of 4 groups was designed to permit a separation of effects related to sign language use (signers vs. nonsigners) and effects related to auditory deprivation (deaf vs. hearing). Forty deaf native signers and nonsigners and 51 hearing signers and nonsigners participated in the study. Signing individuals (both deaf and hearing) were more accurate than nonsigning individuals (deaf and hearing) at memorizing shapes. For the shape memory task but not the object task, deaf signers and nonsigners displayed right hemisphere (RH) advantage over the left hemisphere (LH). Conversely, both hearing groups displayed a memory advantage for shapes in the LH over the RH. Results indicate that enhanced memory performance for shapes in signers (deaf and hearing) stems from the visual skills acquired through sign language use and that deafness, irrespective of language background, leads to the use of a visually based strategy for memory of difficult-to-describe items. (PsycINFO Database Record (c) 2007 APA, all rights reserved)

Visual Memory for Shapes in Deaf Signers and Nonsigners and in Hearing Signers and Nonsigners: Atypical Lateralization and Enhancement. Cattani, Allegra; Clibbens, John; Perfect, Timothy J.; Neuropsychology, Vol 21(1), Jan 2007. pp. 114-121. [Journal Article] Abstract: [Correction Notice: An erratum for this article was reported in Vol 21(3) of Neuropsychology (see record 2007-06185-013). Figure 1 on p. 117 (Stimulus Materials section) depicting sample and match stimuli was incorrect. The labels Object condition and Shape condition should be reversed so that the top row is indicated as the shape condition and the bottom row as the object condition.] Deaf and hearing individuals who either used sign language (signers) or not (nonsigners) were tested on visual memory for objects and shapes that were difficult to describe verbally with a same/different matching paradigm. The use of 4 groups was designed to permit a separation of effects related to sign language use (signers vs. nonsigners) and effects related to auditory deprivation (deaf vs. hearing). Forty deaf native signers and nonsigners and 51 hearing signers and nonsigners participated in the study. Signing individuals (both deaf and hearing) were more accurate than nonsigning individuals (deaf and hearing) at memorizing shapes. For the shape memory task but not the object task, deaf signers and nonsigners displayed right hemisphere (RH) advantage over the left hemisphere (LH). Conversely, both hearing groups displayed a memory advantage for shapes in the LH over the RH. Results indicate that enhanced memory performance for shapes in signers (deaf and hearing) stems from the visual skills acquired through sign language use and that deafness, irrespective of language background, leads to the use of a visually based strategy for memory of difficult-to-describe items. (PsycINFO Database Record (c) 2007 APA, all rights reserved)

Anatomical Substrates of Visual and Auditory Miniature Second-language Learning. By: Newman-Norlund, Roger D.; Frey, Scott H.; Petitto, Laura-Ann; Grafton, Scott T.. Journal of Cognitive Neuroscience, Dec2006, Vol. 18 Issue 12, p1984-1997, 14p Abstract: Longitudinal changes in brain activity during second language (L2) acquisition of a miniature finite-state grammar, named Wernickese, were identified with functional magnetic resonance imaging (fMRI). Participants learned either a visual sign language form or an auditory-verbal form to equivalent proficiency levels. Brain activity during sentence comprehension while hearing/viewing stimuli was assessed at low, medium, and high levels of proficiency in three separate fMRI sessions. Activation in the left inferior frontal gyrus (Broca's area) correlated positively with improving L2 proficiency, whereas activity in the right-hemisphere (RH) homologue was negatively correlated for both auditory and visual forms of the language. Activity in sequence learning areas including the premotor cortex and putamen also correlated with L2 proficiency. Modality-specific differences in the blood oxygenation level-dependent signal accompanying L2 acquisition were localized to the planum temporale (PT). Participants learning the auditory form exhibited decreasing reliance on bilateral PT sites across sessions. In the visual form, bilateral PT sites increased in activity between Session 1 and Session 2, then decreased in left PT activity from Session 2 to Session 3. Comparison of L2 laterality (as compared to L1 laterality) in auditory and visual groups failed to demonstrate greater RH lateralization for the visual versus auditory L2. These data establish a common role for Broca's area in language acquisition irrespective of the perceptual form of the language and suggest that L2s are processed similar to first languages even when learned after the ''critical period.'' The right frontal cortex was not preferentially recruited by visual language after accounting for phonetic/structural complexity and performance. [ABSTRACT FROM AUTHOR] (AN 23263679)

Repetitive Transcranial Magnetic Stimulation of Broca's Area Affects Verbal Responses to Gesture Observation. By: Gentilucci, Maurizio; Bernardis, Paolo; Crisi, Girolamo; Volta, Riccardo Dalla. Journal of Cognitive Neuroscience, Jul2006, Vol. 18 Issue 7, p1059-1074, 16p Abstract: The aim of the present study was to determine whether Broca's area is involved in translating some aspects of arm gesture representations into mouth articulation gestures. In Experiment 1, we applied low-frequency repetitive transcranial magnetic stimulation over Broca's area and over the symmetrical loci of the right hemisphere of participants responding verbally to communicative spoken words, to gestures, or to the simultaneous presentation of the two signals. We performed also sham stimulation over the left stimulation loci. In Experiment 2, we performed the same stimulations as in Experiment 1 to participants responding with words congruent and incongruent with gestures. After sham stimulation voicing parameters were enhanced when responding to communicative spoken words or to gestures as compared to a control condition of word reading. This effect increased when participants responded to the simultaneous presentation of both communicative signals. In contrast, voicing was interfered when the verbal responses were incongruent with gestures. The left stimulation neither induced enhancement on voicing parameters of words congruent with gestures nor interference on words incongruent with gestures. We interpreted the enhancement of the verbal response to gesturing in terms of intention to interact directly. Consequently, we proposed that Broca's area is involved in the process of translating into speech aspects concerning the social intention coded by the gesture. Moreover, we discussed the results in terms of evolution to support the theory [Corballis, M. C. (2002). From hand to mouth: The origins of language. Princeton, NJ: Princeton University Press] proposing spoken language as evolved from an ancient communication system using arm gestures. [ABSTRACT FROM AUTHOR] (AN 21656849)

Regional Brain Activation Evoked When Approaching a Virtual Human on a Virtual Walk. (English) By: Morris, James P.; Pelphrey, Kevin A.; McCarthy, Gregory. Journal of Cognitive Neuroscience, Nov2005, Vol. 17 Issue 11, p1744-1752, 9p. Language: Czech Abstract: We investigated the necessity of biological motion for activation of the posterior superior temporal sulcus (pSTS) in circumstances in which the rapid approach of the observer to a virtual human induced the observer to make inferences about the characters intentions. Using a virtual reality environment, subjects experienced themselves walking towards a complex scene composed of animate and/or inanimate objects. During "person" trials, the scene contained a virtual human either making a simple gesture such as scratching his face (Study 1) or standing completely still (Study 2). During "object" trials, the scenes contained items such as furniture, a face portrait, and a clock, but not the virtual human. Using functional MRI to measure brain activity, we demonstrated strong activity in the pSTS while the observer approached the social scene, but only when the virtual human was making gestures. This result emphasizes the importance of biological motion in inferring the intentions of others. [ABSTRACT FROM AUTHOR] DOI: 10.1162/089892905774589253 (AN 18701106)

Visual attention in deaf and hearing infants: the role of auditory cues. By: Harris, Margaret; Chasin, Joan. Journal of Child Psychology & Psychiatry, Oct2005, Vol. 46 Issue 10, p1116-1123, 8p, 4 charts, 2 graphs Abstract: Background: Successful communication with profoundly deaf children is heavily dependent on visual attention. Previous research has shown that mothers of deaf children -- notably those who are deaf themselves -- use a variety of strategies to gain their children's attention. This study compares patterns of visual attention in deaf and hearing children to determine how they are affected by the absence of auditory cues, especially when looking to the mother's face. Method: The visual attention of 18-month-old infants to their mothers was examined in two groups of deaf children (6 with deaf mothers and 6 with hearing mothers) and two of hearing children (6 with deaf mothers and 8 with hearing mothers). Dyads were observed in free play and 10 minutes of videorecorded interaction was analysed. All looks to the mother were classified as Spontaneous, Responsive (Child turns in response to something done by mother) or Elicited (Mother actively seeks to gain child's attention by, e.g., tapping or waving). The kind of event that attracted the child's attention in Responsive and Elicited episodes was also determined (e.g., object movement, speech, physical contact), as was the focus of the child's attention (e.g., mother's face, mother's body). Results: Responsive looks to the mother were the most frequent for all groups but on only about 25% of occasions were they directed to her face. Elicited and spontaneous looks occurred less often but were frequently directed to the mother's face. Spontaneous looking occurred in all groups but elicited looking very seldom occurred in Hearing--Hearing dyads. Overall, there were fewer looks to the mother in the two groups where mother and child had congruent hearing status, although the proportion of the looks to the mother's face was similar. Conclusions: Both spontaneous and elicited looks are likely to involve attention to the mother's face. However, while active elicitation of attention is an important part of successful... [ABSTRACT FROM AUTHOR] DOI: 10.1111/j.1469-7610.2005.00405.x (AN 18316287)

Sign language: Its history and contribution to the understanding of the biological nature of language. By: Ruben, Robert. Acta Oto-Laryngologica, May2005, Vol. 125 Issue 5, p464-467, 4p Abstract: Conclusion The development of conceptualization of a biological basis of language during the 20th century has come about, in part, through the appreciation of the central nervous system's ability to utilize varied sensory inputs, and particularly vision, to develop language. Objective Sign language has been a part of the linguistic experience from prehistory to the present day. Data suggest that human language may have originated as a visual language and became primarily auditory with the later development of our voice/speech tract. Sign language may be categorized into two types. The first is used by individuals who have auditory/oral language and the signs are used for special situations, such as communication in a monastery in which there is a vow of silence. The second is used by those who do not have access to auditory/oral language, namely the deaf. Material and methods The history of the two forms of sign language and the development of the concept of the biological basis of language are reviewed from the fourth century BC to the present day. Results Sign languages of the deaf have been recognized since at least the fourth century BC. The codification of a monastic sign language occurred in the seventh to eighth centuries AD. Probable synergy between the two forms of sign language occurred in the 16th century. Among other developments, the Abbey de L’Épée introduced, in the 18th century, an oral syntax, French, into a sign language based upon indigenous signs of the deaf and newly created signs. During the 19th century, the concept of a “critical” period for the acquisition of language developed; this was an important stimulus for the exploration of the biological basis of language. The introduction of techniques, e.g. evoked potentials and functional MRI, during the 20th century allowed study of the brain functions associated with language. [ABSTRACT FROM AUTHOR] DOI: 10.1080/00016480510026287 (AN 16968806)

Spero possano esserti utili

Buona vita

Guglielmo

[Anandamyde]

grazie mille a tutti!

avrò un bel lavoro da fare quest'estate a spulciare tutte queste cose!
per ora faccio "raccolta"...così posso studiare bene per gli ultimi esami...appena finiti quelli...si comincia con l'analisi degli articoli