By Todd E. Feinberg
It can be the inner most secret of philosophy, psychology, and neuroscience: how does the mind unite to create the self, the subjective "I"? In Altered Egos, Dr. Todd Feinberg provides a brand new conception of the self, in response to his first-hand adventure as either a psychiatrist and neurologist.
Feinberg first introduces the reader to dozens of fascinating circumstances of sufferers whose issues have led to what he calls "altered egos": a transformation within the mind that transforms the limits of the self. He describes sufferers that suffer from "alien hand syndrome" the place one hand may perhaps assault the patient's personal throat, sufferers with frontal lobe harm who invent great tales approximately their lives, paralyzed sufferers who reject and disown one in every of their limbs. Feinberg argues that the mind harm suffered by way of those humans has performed extra than just impair convinced functions--it has fragmented their experience of self. After illustrating how those sufferers offer a window into the self and the brain, the writer provides a brand new version of the self that hyperlinks the workings of the mind with certain and private good points of the brain, resembling which means, objective, and being. Drawing on his personal and different proof, Feinberg explains how the unified self, whereas now not positioned in a single or one other mind area, arises out of the fabulous complexity and variety of the brain's part components.
Lucid, insightful, jam-packed with interesting case experiences and provocative new rules, Altered Egos gives you to alter the way in which we take into consideration human recognition and the construction and upkeep of human identification.
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Extra resources for Altered Egos How the Brain Creates the Self
In this connection, Horne and Butler (1995) suggested that the cerebello–thalamo–cortical pathway receives a form of efference copy from the motor cortex and compares this message with that derived from peripheral afferents concerning the actual progress of the movement. 3. Fractured Somatotopy From probing the vermal area of the cerebellar cortex (crus I and crus II) in rats by means of microelectrode micromapping methods, Shambes, Gibson, and Welker (1978) found that cutaneous mechanoreceptors terminate within columnar assemblies of granule cells appearing as individual patches, which in turn make up mosaics.
The parallel ﬁbers make synaptic contact with the dendritic spines of the Purkinje cells, as well as with stellate, basket, and Golgi cells. According to one estimate, some 200,000 parallel ﬁbers make contact with a single Purkinje cell in the cat and 250,000 cells in the human. According to another estimate, of the 400,000 parallel ﬁbers passing through the dendritic tree of a Purkinje cell, only 80,000 make synaptic contact. In any event, a given Purkinje cell is under the inﬂuence of a large number of granule cells.
Starting from the point that Golgi cells, being inhibitory, exert both a feedback and a feedforward inhibition of granule cell activity, De Schutter, Vos, and Maex (2000) and Vos et al. 7. Two diagrams from Ramon ´ y Cajal showing, on the left at top, a Golgi cell with its synapses onto the glomeruli of three granule cells, and on the right at top, a basket cell with its synapses onto two Purkinje cells. Both cell types receive their input from the parallel ﬁbers. Arrows indicate direction of impulses.