A stranger in half your body An amazing study has just been published online in Consciousness and Cognition about a patient with epilepsy who felt the left half of his body was being “invaded by a stranger” when he had a seizure. As a result, he felt he existed in one side of his body only. The research is from the same Swiss team who made headlines with their study that used virtual reality to make participants feel they were in someone else’s body, and one where brain stimulation triggered the sensation of having an offset ‘shadow body’ in patients undergoing neurosurgery. The researchers suggest that having an integrated sense of our own bodies involves three types of perception: self-location – the area where we experience the self to be located; first-person perspective – the perceived centre of the conscious experience; and self-identification – the degree to which we identify sensations with our own bodies. Patient 1 is a 55 year old, left-handed male patient suffering from epilepsy since the age of 14 years.
Student Nurse - A&P Anatomy and Sectional Terminology It sounds silly, but you learn as many new words in an A&P course as you do a beginning foreign language course. Really --there's been research to prove it! Links here are for general A & P resources. 120 Ways to Boost Your Brain Power - StumbleUpon Here are 120 things you can do starting today to help you think faster, improve memory, comprehend information better and unleash your brain’s full potential. Solve puzzles and brainteasers.Cultivate ambidexterity. Use your non-dominant hand to brush your teeth, comb your hair or use the mouse. Write with both hands simultaneously. Readers’ Contributions Dance! Contribute your own tip! There are many, many ways to keep our brains sharp.
Dyslexia Dyslexia, or developmental reading disorder, is characterized by difficulty with learning to read fluently and with accurate comprehension despite normal or above-average intelligence. This includes difficulty with phonological awareness, phonological decoding, processing speed, orthographic coding, auditory short-term memory, language skills/verbal comprehension, and/or rapid naming. Dyslexia is the most common learning difficulty and most recognized reading disorder. There are other reading difficulties that are unrelated to dyslexia. Classification Internationally, dyslexia has no single definition; more than 70 names are used to describe its manifestations, characterizations or causes. Numerous symptom-based definitions of dyslexia suggest neurological approaches. Signs and symptoms Language Associated conditions Causes Neuroanatomy Genetics Gene-environment interaction Management Epidemiology History
Coloured hearing in Williams syndrome The idea that our genes can affect many of the traits that define us as individuals, including our personality, intelligence, talents and interests is one that some people find hard to accept. That this is the case is very clearly and dramatically demonstrated, however, by a number of genetic conditions, which have characteristic profiles of psychological traits. Genetic effects include influences on perception, sometimes quite profound, and other times remarkably selective. A recent study suggests that differences in perception in two conditions, synaesthesia and Williams syndrome, may share some unexpected similarities. Williams syndrome is a genomic disorder caused by deletion of a specific segment of chromosome 7. Due to the presence of a number of repeated sequences, this region is prone to errors during replication that can result in deletion of the intervening stretch of the chromosome, which contains approximately 28 genes.
Scientific Video Site Ancient origins of the cerebral cortex Just how special is the human brain? Compared to other mammals, the thing that stands out most is the size of the cerebral cortex – the thick sheet of cells on the outside of the brain, which is so expanded in humans that it has to be folded in on itself in order to fit inside the skull. The cortex is the seat of higher brain functions, the bit of the brain we see with, hear with, think with. All mammals have a cortex and it generally increases in size over evolution. Expansion is coupled with an increase in the complexity of the cortex, as defined by the number of distinct cortical areas. But when in evolution did the cortex actually evolve? Whether particular brain structures in different species are related to each other (i.e., whether they diverged from a single structure in a common ancestor) is often a subject of debate and controversy. Tomer R, Denes AS, Tessmar-Raible K, & Arendt D (2010).
Transcranial Reprogramming of Action? Induction Problems in ppTMS : Developing Intelligence With our introduction to paired pulse transcranial magnetic stimulation (ppTMS) out of the way, we now turn to a 2010 PNAS paper by Neubert, Mars, Buch, Olivier & Rushworth in which conditioning TMS is applied to the right inferior frontal gyrus (rIFG) as well as the pre-supplementary motor area (pre-SMA) between 3 and 18ms prior to TMS over the contralateral primary motor cortex (M1). Note that all of these areas are known to interact in exceedingly complex ways based on the task subjects are performing, the intensity of the magnetic stimulation, the relative intensities of the paired pulses, and the subjects’ proximity to the initiation of movement at the time of conditioning TMS (all described yesterday). Skip the blockquotes unless you want to know about the detailed methods & results (they are actually quite interesting). The “cognitive-level” take-home is below the block quote. What does this extremely rigorous and careful study really tell us?