A deep look into the microstructure of planum temporale
with the speed of auditory speech processing has now become possible with the help of a new form of magnetic resonance imaging (MRI) in combination with electroencephalography (EEG).
Melodi (beste) ve tekst (gufte)nin senkronize islenmesinde sol posterior planum temporale
, senkronize sarki soylemede bilateral inferior pariyetal lobul anterior kismi ve sag posterior planum temporale
, senkronize konusmada ise sol anguler girus aktive olmaktadir.
Unique to the human brain is a region within the planum temporale
(itself situated in Wernicke's area, which is a larger locus associated with language comprehension).
In this paper, the evidence about brain abnormalities in different stmctures associated with dyslexia is examined: planum temporale
, parietal lobe, corpus callosum, cerebellum, insula and right hemisphere.
In 1968 Geschwind and his then student Walter Levitsky had shown in the general population that the planum temporale
, comprising part of the auditory association cortex involved in linguistic functions, was large on the left and small on the right, perhaps explaining language lateralization to the left hemisphere.
Nevertheless, studies on two cerebral structures, the planum temporale
and the corpus callosum , show how controversial scientific evidence can be accepted as fact when structure and function are conflated.
A new study finds that the common chimpanzee, despite its inability to speak, shares with people one feature of this anatomical pattern--a structure called the planum temporale
is larger on the left side of the brain than on the right.
In most people, the planum temporale
, which corresponds roughly to Wernicke's area, is larger on the left than on the right (Geschwind & Levitsky, 1968), and Galaburda, Corsiglia, Rosen & Sherman (1987) report evidence that this asymmetry is achieved through the loss or 'pruning' of cells on the right side during growth.
For example, new research indicates that there may be variations in the brain structure called the planum temporale
, a language-related area found in both sides of the brain.
The structures that have been measured most frequently in studies of language and reading impairment are the auditory structures on the superior surface of the temporal lobe -- Heschl's gyrus and the planum temporale
. Heschl's gyrus is one of the few structures that is present in every brain and can be recognized with little or no training (see Figure 3).
Thus the placement of much of this particular area, known as the planum temporale
, in the left hemisphere may improve handling of the verbal and musical information that facilitates perfect pitch, Schlaug's group contends.
asymmetry, reappraisal since Geschwind and Levitsky, Neuropsychologia, 25, 853-868.