The process of receiving and decoding spoken words takes place
in the auditory cortex, which is the part of the human brain's cerebral cortex that processes auditory input.
Facilitatory mechanisms underlying selectivity for the direction and rate of frequency modulated sweeps
in the auditory cortex.
This pattern suggests that the propagation of the broad - spectrum oscillatory profile
in auditory cortex to key regions of the language network was reduced in subjects with autism relative to controls (Figure 4).
False positives
in auditory cortex were further eliminated using an extend threshold > 30 voxels for all analyses.
The simultaneous EEG and fMRI recordings allowed us to explore how theta power fluctuations driven by the movie correlate with local synaptic activity
in auditory cortex, as indexed by the BOLD signal (Magri et al., 2012; see Materials and Methods).
This impairs learning
in the auditory cortex, meaning old mice can't discriminate between two tones that are close in pitch.
When the team blocked adenosine, they saw a rise in the number of neurons
in the auditory cortex responding to sounds.
The results show that brain activity
in the auditory cortex continues without any problems, as long as we are subjected to sound alone.
Inefficiencies in the six - month - olds appeared
in the auditory cortex.
As a result, the neurons
in the auditory cortex form what is known as a tone map.
Each nerve hair is tuned to a particular frequency of sound and excites only certain neurons
in the auditory cortex.
Froemke says his team's latest findings reveal that while mammals recognize sounds
in the auditory cortex of their brains, the signaling levels of nerve cells in this brain region are simultaneously being strengthened or weakened in response to surrounding context.
Sensory neurons, such as
those in auditory cortex, on average respond relatively indiscriminately at the beginning of a new stimulus, but rapidly become much more selective.
In the current study, researchers found to their surprise that most of the nerve cells
in auditory cortex neurons that stimulate brain activity (excitatory) had signaled less (had «weaker» activity) when the mice expected and got a reward.
Dr. Daniel Bendor, from University College London, describes a novel way that neurons
in auditory cortex can encode temporal information, based on how their excitatory and inhibitory inputs get mixed together.
They measured brain activity
in the auditory cortex while participants were identifying vowel sounds.
Music is processed
in the auditory cortex in this same region of the brain, which was why Charyton wanted to study the effect of music on the brains of people with epilepsy.
The researchers found evidence for a «voice area»
in the auditory cortex of these macaques: a discrete region of the anterior temporal lobe in which activity was greater for macaque vocalizations than for other sound categories.
To make matters more challenging, Lappas decided at this early stage in the experiment to search for patterns not only
in the auditory cortex but in other areas of the brain as well.
Not exact matches
In particular, in the BOLD signal changes in response to the altered music (compared to the original music) were smaller in the right primary and secondary auditory cortex (Fig. 2 and Fig. 4), but larger in left - hemispheric superior temporal and inferior - frontal cortices (Fig. 2B
In particular,
in the BOLD signal changes in response to the altered music (compared to the original music) were smaller in the right primary and secondary auditory cortex (Fig. 2 and Fig. 4), but larger in left - hemispheric superior temporal and inferior - frontal cortices (Fig. 2B
in the BOLD signal changes
in response to the altered music (compared to the original music) were smaller in the right primary and secondary auditory cortex (Fig. 2 and Fig. 4), but larger in left - hemispheric superior temporal and inferior - frontal cortices (Fig. 2B
in response to the altered music (compared to the original music) were smaller
in the right primary and secondary auditory cortex (Fig. 2 and Fig. 4), but larger in left - hemispheric superior temporal and inferior - frontal cortices (Fig. 2B
in the right primary and secondary
auditory cortex (Fig. 2 and Fig. 4), but larger
in left - hemispheric superior temporal and inferior - frontal cortices (Fig. 2B
in left - hemispheric superior temporal and inferior - frontal
cortices (Fig. 2B).
In addition to the asymmetry of
auditory cortex activation for the processing of the original music, we showed that BOLD signals were modulated by alterations of the musical stimuli.
Thus, the right - lateralized
auditory cortex activation was attributable to the specific features of the (mainly consonant and structured) original music and was not simply an unspecific response that could have been elicited by any sound
in general.
What's more, these genes are expressed
in both the
auditory and visual
cortices of the brain during childhood development, the researchers report today
in the Proceedings of the National Academy of Sciences.
The thinking goes that most cases of chronic tinnitus result from changes
in the signals sent from the ear to neurons
in the brain's
auditory cortex.
Specialized sensory neurons
in the inner ear, called hair cells, are responsible for the detection of sounds, and this information is transmitted to the
auditory cortex via several intermediate structures.
She and her colleagues focused on the neuronal activity
in the trapezoid body, a structure located
in the brainstem that forms part of the pathway that eventually leads to the
auditory cortex.
As a subject imagined hearing words, his
auditory cortex lit up the screen
in a characteristic pattern of reds and greens.
The
auditory cortex and an area
in its vicinity long believed to be associated with speech, called Wernicke's area, were also active.
In the course of examining single unit responses from the
cortex of unrestrained and unanesthetized cats, we have come upon a population of cells that appears to be sensitive to
auditory stimuli only if the cat «pays attention» to the sound source.
Within older adults who scored below the normal benchmark on a dementia screening test, but have no noticeable communication problems, scientists have discovered a new potential predictor of early dementia through abnormal functionality
in regions of the brain that process speech (the brainstem and
auditory cortex).
The team found that approximately five percent of the neurons
in the higher
auditory cortex reacted to the tutor song and that this could be indicative of where the early
auditory memory is located
in the brain.
A new study published
in PLOS Computational Biology investigates how temporal acoustic patterns can be represented by neural activity within
auditory cortex, a major hub within the brain for the perception of sound.
The researchers used a technique called magnetoencephalography, which detects the firing of neurons as changes
in the brain's magnetic field, to monitor the responses of the
auditory cortex to the tones.
The existence of
auditory responses
in the occipital
cortex of cataract - recovery patients, as observed
in the study, therefore poses crucial questions regarding how these non-visual inputs coexist or even interfere with visual functions.
The analysis revealed that by 26 weeks of gestation, the primary
auditory cortex was
in a much more advanced stage of development than the nonprimary
auditory cortex.
The team also found an association between the delayed development of the nonprimary
auditory cortex in infancy and language delays
in the children at age 2, suggesting that disruptions to this part of the brain as a result of premature birth may contribute to the speech and language problems often seen later
in life
in preemies, Monson said.
Between 26 weeks and about 40 weeks — the latter the equivalent of full - term birth — the nonprimary
auditory cortex in the preterm infants matured quickly, partially catching up to the primary
auditory cortex.
The team used diffusion neuroimaging to study development of the
auditory cortex in the infants» brains.
The team focused on the primary
auditory cortex, which is the first cortical region to receive
auditory signals from the ears via other parts of the brain, and the nonprimary
auditory cortex, which plays a more sophisticated role
in processing those stimuli.
According to a study conducted by researchers from CNRS and Inserm at the Centre de Recherche en Neurosciences de Lyon (CNRS / Inserm / Université Claude Bernard Lyon 1), amusics exhibit altered processing of musical information
in two regions of the brain: the
auditory cortex and the frontal
cortex, particularly
in the right cerebral hemisphere.
In fact, the parietal
cortex is critical to
auditory and tactile awareness as well as visual concentration, so Lavie's results are likely to have implications for a wide range of activities.
The scientists observed that, when hearing and memorizing notes, amusics exhibited altered sound processing
in two regions of the brain: the
auditory cortex and the frontal
cortex, essentially
in the right hemisphere.
Finally, the researchers tested this circuitry
in live animals, artificially turning on the motor neurons
in anesthetized mice and then looking to see how the
auditory cortex responded.
From the MEG signal, researchers were able to detect FFR signals coming from the
auditory cortex,
in addition to the known sub-cortical generators, something that had not previously been detected.
Cats deaf from an early age have increased outgoing connections from the
auditory cortex to a midbrain region responsible for directing the animal to a particular location
in its environment.
«Reorganization of brain outputs
in deaf cats: Increased connections from
auditory cortex to superior colliculus may support enhanced information process after hearing loss.»
Dennis Barbour, MD, PhD, associate professor of biomedical engineering
in the School of Engineering & Applied Science who studies neurophysiology, found
in an animal model that
auditory cortex neurons may be encoding sounds differently than previously thought.
Even
in adulthood, experiencing new sounds can rewire the
auditory cortex.
A fetus starts to hear at about 24 weeks of gestation, as neurons migrate to — and form connections
in — the
auditory cortex, a brain region that processes sound, Stromswold explains.
Babies exposed to their mothers» voices had significantly thicker
auditory cortices than those
in the control group, the researchers report online today
in the Proceedings of the National Academy of Sciences.