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Citação de: Sergiomgbr em 24 de Dezembro de 2015, 21:30:45Citação de: Buckaroo Banzai em 24 de Dezembro de 2015, 18:49:06Neurônios são espalhados pelo corpo mas a mente está "acontecendo" no cérebro, O cerebelo já teve status menos favorável na questão da formação da mente, e se não me engano, a medula espinhal também...Creio que não se considera que qualquer de ambas essas partes seja algo fundamental para a consciência.
Citação de: Buckaroo Banzai em 24 de Dezembro de 2015, 18:49:06Neurônios são espalhados pelo corpo mas a mente está "acontecendo" no cérebro, O cerebelo já teve status menos favorável na questão da formação da mente, e se não me engano, a medula espinhal também...
Neurônios são espalhados pelo corpo mas a mente está "acontecendo" no cérebro,
Durante muito tempo pensava-se que a informação que chegava ao cerebelo (e quecomo vocês vão ver é muito maior do que a que sai, após trabalhada) era umainformação basicamente propreoceptiva. Hoje sabe-se que não: a informação quechega ao cerebelo é muito extroceptiva. A informação que através do pedúnculocerebeloso médio atinge o cerebelo (e vocês vão ver que é o maior dos pedúnculos) équase toda extroceptiva, com a excepção do que vem das áreas 4 e 6, que são áreasmotoras. Além disso, a informação vestibular, que é extroceptiva também, é umainformação importantíssima para o cerebelo poder integrar aquilo que sai, o finaloutput. http://cc03-09.med.up.pt/2ano/neuro/cerebelo0405.pdf
PART OF BRAIN WHICH CONTROLS CONSCIOUSNESS, MEDICAL INTEREST. Consciousness is defined as the state of awareness of self and the environment. Another way of describing it is a condition for which a person is capable of perceiving stimuli from the environment and responding appropriately.The consciousness system has two principal functions:1) Maintenance of waking state (arousal or level of consciousness)2) Content of experience (awareness or content of consciousness)It is important to understand the difference between these two. Arousal shows the wakefulness of one person and awareness is the person ability to perceive the environment. In vegetative state, ones are awake but unaware of themselves or the environment.In this article, we will look into the concept of neuronal system involved in consciousness system. It is crucial to realize that detail discussion is beyond the scope of this article and only essential and relevant elements to the medical point of view will be touched.The consciousness system is a diffuse yet organized neuronal system located in the brainstem, diencephalon, and cerebral hemispheres with diffuse reciprocal connections. Although it is complex and still much to be explored, it can be divided into few groups of structures for current understanding. This includes:1) Nuclei of the brainstem reticular formation, hypothalamus, basal forebrain, and thalamus;2) The ascending projection pathways;3) Widespread areas of the cerebral cortexLet’s look into their role and importance in consciousness systemReticular FormationThis is a complex aggregate of neurons with its cell bodies form clusters in the tegmentum of brainstem, the basal forebrain, and the thalamus. It is known as reticular because of its diffuse multipolar synapses and interconnection. This reticular formation can be further subdivided functionally into 3 columns: the raphe (midline), the medial and lateral region. The function of each column is summarized in the diagram below (Fig 1). The reticular formation has tremendous afferent and efferent connection ranging from cerebral cortex, thalamus, hypothalamus, to the spinal cord. Generally, such tremendous pathway of the reticular formation can be described into 2 parts, the rostral part and the caudal part. The rostral part reticular formation, vaguely begin at the level of the upper pons and midbrain, contains neurochemically classified groups of neurons that project to the cerebral cortex either directly or by relay in the thalamus. This is the reticular ascending pathway (some named it activating reticular ascending pathway abbr. ARAS) and it is important in the consciousness system. The caudal part (vaguely the lower pons and medulla) has projection to the spinal cord and is involved in motor function, respiration and regulation of blood pressure. This is the descending pathway. Although it is divided vertically as such, you should keep in mind that the ascending pathway does arise from medulla as well. You may read in some textbooks that reticular formation can be divided into cerebellar portion and non-cerebellar portion but it is not relevant here, similarly to some of the more specifically named nuclei.https://teddybrain.wordpress.com/2013/08/28/a-brief-review-on-consciousness-from-medical-interest/
Médicos descobriram uma mulher sem cerebeloO caso dessa mulher apresenta um exemplo fascinante de neuroplasticidade – processo pelo qual uma ou mais regiões do cérebro se adaptam para compensar danos causados a uma área diferente do cérebro, ou uma perda de alguma função corporal.http://hypescience.com/mulher-sem-cerebelo/http://hypescience.com/mulher-sem-cerebelo/
The combination of the above approach with recent work on emotion ispowerful, allowing the formation of a global theory of brain function in whichdynamicinteractions among brain areas and brain events can be mapped atmany levels of organization. An important prediction of the approach is thatbrain mechanisms once thought devoted to motor activity are also active inemotional and cognitive activities. Our example is the cerebellum. As we shallsee, it appears that the cerebellum is not only a coordinator of motor actions,but also of reasoning and, most recently discovered, of emotional with cognitivestates.Continua>>> http://www.kirbyait.com/profinfo/integrative_role_cog_emotion.pdf
