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Asymmetry in the Sylvian fissure (also known as the lateral sulcus), which separates the frontal and parietal lobes from the temporal lobe, was one of the first incongruencies to be discovered. Its anatomical variances are related to the size and location of two areas of the human brain that are important for language processing, Broca's area ...
The Yakovlevian torque [25] (a.k.a. "counterclockwise brain torque" [28] refers to an anatomical peculiarity of the normal brain. On average, the frontal lobes are asymmetric to the left (the right lobe appears slightly larger than the left), whereas the occipital lobe is asymmetric to the right; the central sulcus and temporal lobe of the ...
Asymmetry between the lobes is noted as a petalia. [18] The hemispheres are connected by five commissures that span the longitudinal fissure, the largest of these is the corpus callosum . [ 7 ] Each hemisphere is conventionally divided into four main lobes ; the frontal lobe , parietal lobe , temporal lobe , and occipital lobe , named according ...
Assessment of the skull from a top view shows asymmetry of the frontal bones, an increased width of the skull and a forward displacement of the ear at the ipsilateral side of the head. [12] Assessment of the skull from a frontal view will show asymmetrical features of the face, including a displacement of the chin point of the jaw and a ...
Fluctuating asymmetry (FA) is often considered to be the product of developmental stress and instability, caused by both genetic and environmental stressors. The notion that FA is a result of genetic and environmental factors is supported by Waddington's notion of canalisation, which implies that FA is a measure of the genome's ability to successfully buffer development to achieve a normal ...
The concept of temporal microstates of brain electrical activity during no-task resting and task execution (event-related microstates) was developed by Dietrich Lehmann and his collaborators (The KEY Institute for Brain-Mind Research, University of Zurich, Switzerland) between 1971 and 1987, [4] [5] [6] ( see "EEG microstates".
Raichle coined the term "default mode" in 2001 to describe resting state brain function; [19] the concept rapidly became a central theme in neuroscience. [20] Around this time the idea was developed that this network of brain areas is involved in internally directed thoughts and is suspended during specific goal-directed behaviors.
It is more pointed than the rounder frontal pole. The frontal pole is at the frontmost part of the frontal lobe in each hemisphere, and is more rounded than the occipital pole. The temporal pole is located between the frontal and occipital poles, and sits in the anterior part of middle cranial fossa in each temporal lobe. [5]