{"id":10218,"date":"2024-02-20T21:28:25","date_gmt":"2024-02-20T21:28:25","guid":{"rendered":"https:\/\/dailyai.com\/?p=10218"},"modified":"2024-02-20T21:57:06","modified_gmt":"2024-02-20T21:57:06","slug":"stanford-ai-model-accurately-differentiates-male-and-female-brains","status":"publish","type":"post","link":"https:\/\/dailyai.com\/pt\/2024\/02\/stanford-ai-model-accurately-differentiates-male-and-female-brains\/","title":{"rendered":"Modelo de IA de Stanford diferencia com exatid\u00e3o c\u00e9rebros masculinos e femininos"},"content":{"rendered":"

O Centro M\u00e9dico da Universidade de Stanford utilizou a IA para detetar diferen\u00e7as estruturais nos c\u00e9rebros de homens e mulheres.\u00a0<\/b><\/p>\n

O estudo conseguiu uma precis\u00e3o superior a 90% na identifica\u00e7\u00e3o do sexo dos indiv\u00edduos com base em exames de atividade cerebral, lan\u00e7ando luz sobre o tema h\u00e1 muito debatido das diferen\u00e7as estruturais espec\u00edficas do sexo no c\u00e9rebro.<\/span><\/p>\n

O <\/span>investiga\u00e7\u00e3o<\/span><\/a>publicado na revista Proceedings of the National Academy of Sciences (PNAS), afirma que estas diferen\u00e7as ir\u00e3o melhorar a nossa compreens\u00e3o e o tratamento das doen\u00e7as neuropsiqui\u00e1tricas que se manifestam de forma distinta nas mulheres e nos homens.<\/span><\/p>\n

O Dr. Vinod Menon, diretor do Laborat\u00f3rio de Neuroci\u00eancia Cognitiva e de Sistemas de Stanford, explicou a import\u00e2ncia de reconhecer as diferen\u00e7as entre os sexos no c\u00e9rebro.\u00a0<\/span><\/p>\n

\"O sexo desempenha um papel crucial no desenvolvimento do c\u00e9rebro humano, no envelhecimento e na manifesta\u00e7\u00e3o de perturba\u00e7\u00f5es psiqui\u00e1tricas e neurol\u00f3gicas\". <\/span>Menon declarou<\/span><\/a>O objetivo do estudo \u00e9 melhorar a nossa compreens\u00e3o das vulnerabilidades mentais e neurol\u00f3gicas espec\u00edficas de cada sexo.<\/span><\/p>\n

Por exemplo, sabemos que as mulheres t\u00eam quase o dobro das probabilidades de serem diagnosticadas com depress\u00e3o, enquanto os homens t\u00eam mais probabilidades de serem diagnosticados com PHDA.\u00a0<\/span><\/p>\n

Outras doen\u00e7as mentais como as perturba\u00e7\u00f5es da personalidade, a bipolaridade e a esquizofrenia tamb\u00e9m se manifestam de forma diferente nos homens e nas mulheres.\u00a0<\/span><\/p>\n

Identificar e classificar com exatid\u00e3o as diferen\u00e7as entre a anatomia do c\u00e9rebro masculino e feminino \u00e9 fundamental para compreender se existe uma explica\u00e7\u00e3o biol\u00f3gica.\u00a0<\/span><\/p>\n

Eis seis passos para descrever o funcionamento do estudo:<\/span><\/p>\n

    \n
  1. O estudo investigou as diferen\u00e7as relacionadas com o sexo na fun\u00e7\u00e3o cerebral, que \u00e9 crucial para compreender os impactos comportamentais e as condi\u00e7\u00f5es de sa\u00fade mental, atrav\u00e9s da an\u00e1lise de dados de resson\u00e2ncia magn\u00e9tica funcional (fMRI) de cerca de 1500 jovens adultos.<\/span><\/li>\n
  2. A IA avan\u00e7ada, especificamente uma rede neural profunda esp\u00e1cio-temporal (stDNN), foi utilizada para analisar exames cerebrais, revelando padr\u00f5es distintos na forma como os c\u00e9rebros masculinos e femininos est\u00e3o organizados.<\/span><\/li>\n
  3. Este modelo de IA, sobre o 90%, demonstrou uma precis\u00e3o impressionante na distin\u00e7\u00e3o entre c\u00e9rebros masculinos e femininos com base na din\u00e2mica funcional, destacando a sua efic\u00e1cia em v\u00e1rias sess\u00f5es e coortes independentes.<\/span><\/li>\n
  4. As principais redes cerebrais - como a rede de modo padr\u00e3o, o estriado e o sistema l\u00edmbico - mostraram diferen\u00e7as significativas entre os sexos, com tamanhos de efeito superiores a 1,5, indicando distin\u00e7\u00f5es robustas na organiza\u00e7\u00e3o cerebral.<\/span><\/li>\n
  5. O estudo utilizou t\u00e9cnicas de IA explic\u00e1vel (XAI) que permitiram identificar as caracter\u00edsticas cerebrais espec\u00edficas respons\u00e1veis por estas diferen\u00e7as, as quais podem prever perfis cognitivos espec\u00edficos de cada sexo.<\/span><\/li>\n
  6. Estas descobertas desafiam as cren\u00e7as anteriores sobre um espetro cont\u00ednuo de organiza\u00e7\u00e3o cerebral entre homens e mulheres, enfatizando o sexo como um fator fundamental na estrutura e fun\u00e7\u00e3o do c\u00e9rebro, com implica\u00e7\u00f5es para abordagens m\u00e9dicas personalizadas no tratamento de perturba\u00e7\u00f5es mentais e neurol\u00f3gicas.<\/span><\/li>\n<\/ol>\n

    Os investigadores levaram a sua investiga\u00e7\u00e3o mais longe, perguntando se podiam prever o desempenho dos indiv\u00edduos em tarefas cognitivas com base nas caracter\u00edsticas cerebrais espec\u00edficas do sexo que tinham identificado.\u00a0<\/span><\/p>\n

    Para o efeito, criaram dois modelos de IA especializados: um adaptado para prever as capacidades cognitivas dos homens e outro para as mulheres. Estes modelos foram informados pelos padr\u00f5es cerebrais distintos relacionados com o sexo que a equipa tinha descoberto anteriormente.<\/span><\/p>\n

    O sucesso destes modelos foi not\u00e1vel. O modelo concebido para os homens previa com exatid\u00e3o o seu desempenho cognitivo, mas n\u00e3o funcionava para as mulheres, e vice-versa. Este facto sugere fortemente que as diferen\u00e7as funcionais na organiza\u00e7\u00e3o cerebral entre os sexos t\u00eam impactos no mundo real sobre o comportamento e as capacidades cognitivas.<\/span><\/p>\n

    Menon explicou a import\u00e2ncia destas descobertas: \"Estes modelos funcionaram muito bem porque conseguimos separar com sucesso os padr\u00f5es cerebrais entre os sexos\", explicou.\u00a0<\/span><\/p>\n

    Esta separa\u00e7\u00e3o levou a uma compreens\u00e3o mais profunda da forma como ignorar as diferen\u00e7as entre os sexos na organiza\u00e7\u00e3o do c\u00e9rebro pode resultar na perda de elementos cruciais que contribuem para as perturba\u00e7\u00f5es neuropsiqui\u00e1tricas.<\/span><\/p>\n

    Menon salientou tamb\u00e9m o potencial mais alargado do seu modelo de IA. Para al\u00e9m de explorar as diferen\u00e7as entre os sexos, o modelo pode ser aplicado a v\u00e1rias quest\u00f5es sobre a conetividade cerebral e a sua rela\u00e7\u00e3o com as fun\u00e7\u00f5es cognitivas ou os comportamentos. <\/span><\/p>\n

    O papel da IA na neuroci\u00eancia est\u00e1 bem estabelecido. Um estudo recente utilizou a aprendizagem autom\u00e1tica para 'recuperar' imagens de exames de resson\u00e2ncia magn\u00e9tica<\/a>e outro utilizou c\u00e9lulas cerebrais para realizar tarefas de reconhecimento de voz.<\/a> <\/span><\/p>\n

    A IA tamb\u00e9m tem sido utilizada para analisar padr\u00f5es de discurso<\/a> em indiv\u00edduos com esquizofrenia e desenvolvem novos avatares terap\u00eauticos 3D<\/a>.\u00a0<\/span><\/p>\n

    No futuro, ser\u00e1 provavelmente poss\u00edvel \"ler a mente\" de algu\u00e9m em tempo real atrav\u00e9s de aplica\u00e7\u00e3o de modelos ML a dados neurol\u00f3gicos<\/a>.<\/span><\/p>\n

    A equipa de Stanford tenciona tornar o seu modelo acess\u00edvel \u00e0 comunidade cient\u00edfica para encorajar mais investiga\u00e7\u00e3o sobre doen\u00e7as mentais e dificuldades de aprendizagem.<\/span><\/p>\n

    A vis\u00e3o de Menon \u00e9 que estas ferramentas de IA compreendam e resolvam os desafios que os indiv\u00edduos enfrentam devido a estas diferen\u00e7as cerebrais.<\/span>\u00a0<\/span><\/p>\n

    Modelos sofisticados de imagiologia cerebral poder\u00e3o vir a contribuir para uma nova era de psiquiatria de precis\u00e3o. Como Menon resume, \"os nossos modelos de IA t\u00eam uma aplicabilidade muito ampla\".<\/span><\/p>","protected":false},"excerpt":{"rendered":"

    O Centro M\u00e9dico da Universidade de Stanford utilizou a IA para detetar diferen\u00e7as estruturais nos c\u00e9rebros de homens e mulheres. O estudo alcan\u00e7ou uma precis\u00e3o superior a 90% na identifica\u00e7\u00e3o do sexo dos indiv\u00edduos com base em exames de atividade cerebral, lan\u00e7ando luz sobre o tema h\u00e1 muito debatido das diferen\u00e7as estruturais espec\u00edficas do sexo no c\u00e9rebro. A investiga\u00e7\u00e3o, publicada na revista Proceedings of the National Academy of Sciences (PNAS), afirma que estas diferen\u00e7as ir\u00e3o melhorar a nossa compreens\u00e3o e o tratamento de doen\u00e7as neuropsiqui\u00e1tricas que se manifestam de forma distinta em homens e mulheres. O Dr. Vinod Menon, diretor do Laborat\u00f3rio de Neuroci\u00eancia Cognitiva e de Sistemas de Stanford, explicou a import\u00e2ncia de reconhecer as diferen\u00e7as entre os sexos no c\u00e9rebro. \"O sexo<\/p>","protected":false},"author":2,"featured_media":10219,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[88],"tags":[331],"class_list":["post-10218","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ethics","tag-neuroscience"],"yoast_head":"\nStanford AI model accurately differentiates male and female brains | DailyAI<\/title>\n<meta name=\"description\" content=\"Stanford University Medical Center used AI to detect structural differences in male and female brains.\u00a0\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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