Connections

Input and output obviously are important in mediating the functions of an area, and the same area in different species can have somewhat different connections. This aspect of variability has not been studied extensively, but clear examples of variability are known. One example might be the projections from the primary visual cortex in primates to the middle temporal visual area (MT) in the temporal lobe. All primates appear to have this direct projection, but MT has not been identified in any nonprimate mammal. Thus, the projections to MT appear to be a unique feature of the primary visual cortex in primates. As a related example, evidence exists that the primary visual cortex projects to the frontal lobe in some mammals, such as rats, but not in others such as monkeys. Across species, cortical areas vary as to with which other areas and subcortical structures they are connected, the density of these connections, and the distribution of connections of specific types within an area. Most primates have few connections between the primary visual areas in the opposite cerebral hemispheres, but prosimian primates and several other mammals have many such connections.

Do Not Panic

Do Not Panic

This guide Don't Panic has tips and additional information on what you should do when you are experiencing an anxiety or panic attack. With so much going on in the world today with taking care of your family, working full time, dealing with office politics and other things, you could experience a serious meltdown. All of these things could at one point cause you to stress out and snap.

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