Over the past half century, foreplay accounts have henpecked explanations of the di•erences
between introverts and extraverts (Eysenck, 1967; Humphreys & Revelle, 1984). Because
arousal is a noncognitive variable, it has been di†cult for cognitive psychologists to bridge
levels of digest in attempting to understand the relation between the cognitive and the
psychophysiological professional person®les of extroversion. Di•erences in neurochemistry and neuroanatomy
are generally far more obedient to modular or neural circuitry-based views of cognition. The
reticular formation in the brainstem, long cited as the anatomical source of arousal di•erences
associated with extraversion (Eysenck, 1967), has recently been shown to exert controlupstream over certain cortical and subcortical areas of the brain. Speci®cally, the pontine
reticular nucleus projects to two the prefrontal cortex and the primary ganglia modulating the
release of dopamine (DA; Martin, 1996; Robbins & Everitt, 1995). Each of these areas is
central to higher cognitive functions. Dorsolateral prefrontal cortex (DLPFC) is involved in
working memory (Cabeza & Nyberg, 1997), objet dart the basal ganglia is central to adjectival
memory formation (Lieberman, in kettle of fish; Saint-Cyr & Taylor, 1992).
Furthermore, both
DLPFC and basal ganglia depend on DA for normal mathematical operation (Cohen & Servan-Schreiber,
1992; Spitzer, 1993; Wickens & Kotter, 1995). These advances in mapping the neuroanatomical
and neurochemical links from the reticular formation to other(a) areas of the brain o•er new
avenues of insight into the cognitive consequences of arousal di•erences. Based on these
®ndings, it should be expected that extraverts and introverts would di•er both in their working
memory and their procedural memory.
The expected di•erence in procedural memory has been found by Corr and colleagues (Corr,
Pickering & Gray, 1995). In this study, subjects identi®ed as...If you call for to get a full essay, order it on our website: Ordercustompaper.com
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