Theoretical models have long pointed to the dentate
gyrus as a possible source of neuronal pattern separation.
Not exact matches
Waning production of neurons and an overall shrinking of the dentate
gyrus, part of the hippocampus thought to help form new episodic memories, was believed to occur in aging humans
as well.
Areas of the visual cortex responsible for recognizing complex visual scenes
as well
as the anterior cingulate
gyrus, which governs attention and motivation, are also active during REM sleep.
Although the fusiform
gyrus has been previously established
as an area of the brain related to facial recognition, this is the first time scientists have made a connection between dopamine and facial recognition.
In fact, fingerprints are, I see
as entirely analogous to the patterns of
gyruses in the brain.
Neurons in the dentate
gyrus activated shortly after the neocortex's signals were sent
as if an echo, cells in the CA3 region «echoed» weakly and neurons in the CA1 actually became calmer when the neocortex fired.
The researchers saw that among the PTSD group, who were all taking the drug paroxetine (sold
as Paxil), the patients who showed the most improvement from the SSRI were those who showed the least activation, prior to treatment, of a brain area called the right ventrolateral prefrontal cortex, also known
as the inferior frontal
gyrus.
However,
as early
as 2002, Olaf Blanke and others induced OBEs by focal electrical stimulation of the brain's right angular
gyrus in a patient undergoing treatment for epilepsy (Nature, vol 419, p 269).
We now know why an individual with a brain injury affecting the inferior frontal
gyrus and the orbito - frontal regions can no longer interpret the emotions related to what his or her peers are saying, and may,
as a result, adopt socially inappropriate behaviour.»
The analysis revealed that while performing working memory tasks, the young patients with concussion had initial activation that was greater than normal, known
as hyperactivation, compared to young controls in the right precuneus and right inferior parietal
gyrus of the brain, whereas the older patients had hypoactivation (less than normal) compared to older controls in the right precuneus and right inferior frontal
gyrus.
All contrasts were limited to the brain locations within the supplementary motor area and the parahippocampal
gyrus,
as defined in the Harvard — Oxford Cortical Structural Atlas (available in FSL software), and a threshold was established, with gaussian random - fields theory, at a cluster - level z value of more than 2.3 (corrected P < 0.05).
Conversely, the imagery period
as compared with the rest period for questions 2 and 3 was associated with extensive activation of the parahippocampal
gyrus and, to a lesser extent, the supplementary motor area; these findings closely matched the activation seen in the spatial localizer scan.
In this subject, the activation associated with the imagery period
as compared with the rest period for question 1 resulted in extensive activation in the supplementary motor area and minimal activity in the parahippocampal
gyrus (Figure 4).
The bottom sets of scans obtained from the patient (Panel C) and the control subject (Panel D) show activation (blue) resulting from the spatial imagery task (cued with the word «navigation»)
as compared with rest periods,
as well
as the time course of the peak voxel in the parahippocampal
gyrus.
Neurogenesis can take place only within specific regions of the brain, such
as the dentate
gyrus of the hippocampus.
Social network proximity was also associated with neural response similarity within areas involved in attentional allocation, such
as the right superior parietal cortex30, 31, and regions in the inferior parietal lobe, such
as the bilateral supramarginal
gyri and left inferior parietal cortex (which includes the angular
gyrus in the parcellation scheme used32), that have been implicated in bottom - up attentional control, discerning others» mental states, processing language and the narrative content of stories, and sense - making more generally33, 34,35.
Waning production of neurons and an overall shrinking of the dentate
gyrus, part of the hippocampus thought to help form new episodic memories, was believed to occur in ageing humans
as well.
Lichtman's Brainbow technique was used here to color code the wires in a mouse's (a) ear muscle, (b) brainstem axon tract, and (c) hippocampal dentate
gyrus,
as part of a 2008 study
Lichtman's Brainbow technique was used here to color code the wires in a mouse's (a) ear muscle, (b) brainstem axon tract, and (c) hippocampal dentate
gyrus,
as part of a 2008 study (Credit: Jeff W. Lichtman and Joshua R. Sanes)
There was no significant increase in progranulin protein levels in the frontal cortex (Fig. 4B h), thalamus (Fig. 4C i), or hippocampus (Fig. 4D j), despite observing the expected increase in doublecortin - positive neurons in the dentate
gyrus (Fig. 4E t), indicating increased neurogenesis
as a positive control.
As such, the current study aimed to characterize connectivity between two key regions implicated in semantic control: inferior frontal
gyrus, pars triangularis (IFGtri) and posterior middle temporal
gyrus (pMTG), during a semantic association task in four BAA and four age - matched, healthy bilingual controls (BHC).
Two of such modules are the ventral (superior parietal cortex
as well
as superior and medial frontal
gyri) and dorsal (superior parietal cortex, superior and dorsal lateral frontal, and precentral
gyri) attention networks identified by previous fMRI analyses [3].
We also found significant interactions between the right middle frontal
gyrus (
as seed) and the right pars triangularis / inferior frontal sulcus and bilateral AIC with respect to GRAMMATICALITY Other combinations of contrasts and seed regions did not yield significant results.
These modules include the visual (yellow), sensory / motor (orange) and basal ganglia (red) cortices
as well
as the default mode network (precuneus / posterior cingulate, inferior parietal lobes, and medial frontal
gyrus; maroon).
Nevertheless, we could see that brain regions such
as SII, insula, cingulate
gyrus, amygdala / hippocampal formation and prefrontal cortices might be important when differentiating the acupuncture specific effect from sham acupuncture.
Abbreviations: AMPAR, AMPA receptor;
AS, Angelman syndrome; BDNF, brain - derived neurotrophic factor; CaMKII, α - calcium / calmodulin - dependent protein kinase II; CGN, cerebellar granule neuron; co-IP, coimmunoprecipitation; DG, dentate
gyrus; ERK, extracellular signal - regulated kinase; fEPSP, field excitatory postsynaptic potential; Gab1, Grb2 - associated binder 1; HFS, high frequency stimulation; IGF, insulin - like growth factor; LTP, long - term potentiation; PSD - 95, postsynaptic density protein - 95; SYN, synaptophysin; WT, wild type
Although each sensory and motor region is myelinated before a person turns five — the visual nerves myelinate by six months, for example — the regions in the brain that support reading, such
as the angular
gyrus, which supports language comprehension, doesn't myelinate until at least five years old, and often more slowly in boys.
Prior to joining Chuck & Don's, Murphy served
as vice president of fiance at FMG Tsumura, CFO and vice president of administration at Everest Medical Corporation, and executive vice president and CFO at
Gyrus Group.
British American Tobacco (Active, acting for BAT) Ultra Electronics (Active, acting for UE) Olympus and its subsidiary
Gyrus Group (Ended in successful defence for the pair) Vincent & Robert Tchenguiz (acted for SFO and Treasury Solicitor's department, Slaughters was on retainer for its services with partner Jonathan Cotton leading) Rolls Royce (acting for RR
as prinicipal adviser along with Debevoise, lead partners were Richard Swallow and Jonathan Clark)
Internal attributions of events, where the self was viewed
as an active intentional agent, involved left precentral
gyrus (BA 6) and left middle temporal
gyrus (BA 39).
Moreover,
as the fusiform
gyrus is closely related to attentional bias and detection of emotional information (Amin et al., 2004), the higher one's detection level reaches, the stronger the activation in the fusiform
gyrus is likely to be.