David B. Givens Quotes

A recent invention, vocal language may date back only ca. 200,000 years. As human primates, we have not fully come to grips with the prolonged, face-to-face closeness required for speech. Speaking to a stranger, e.g., stresses our autonomic nervous system's sympathetic (i.e., fight-or-flight) division, which a. speeds our heartbeat, b. dilates our pupils, and c. cools and moistens our hands. The limbic brain's hypothalamus instructs the pituitary gland to release hormones into the circulatory system, arousing our blood, sweat, and fears.

Though we may show a polite grin or camera smile at will, the zygomatic or heartfelt smile is hard to produce on demand. While the former cue may be consciously manipulated (and is subject to deception), the latter is controlled by emotion. Thus, the zygomatic smile is a more accurate reflection of mood.

As the brain and body were shaped by natural selection, consumer goods adapted to the mind through a parallel process of product selection, which has rendered them ever more fluent, expressive, and fascinating to our senses.

Their combined verbal and nonverbal IQs make hands our most expressive body parts. Hands have more to say even than faces, for not only do fingers show emotion, depict ideas, and point to butterflies on the wing--they can also read Braille, speak in sign languages, and write poetry. Our hands are such incredibly gifted communicators that they always bear watching.

Feedback smile. Smiling itself produces a weak feeling of happiness. The facial feedback hypothesis proposes that ". . . involuntary facial movements provide sufficient peripheral information to drive emotional experience" (Bernstein et al. 2000). According to Davis and Palladino (2000), ". . . feedback from facial expression [e.g., smiling or frowning] affects emotional expression and behavior." In one study, e.g., participants were instructed to hold a pencil in their mouths, either between their lips or between their teeth. The latter, who were able to smile, rated cartoons funnier than did the former, who could not smile (Davis and Palladino 2000).

Women are superior to men in decoding nonverbal cues (Rosenthal and DePaulo 1979).

Humans are what they are today because their ancestors followed a knowledge path. At every branch in the 500-million-year-old tree of vertebrate evolution, the precursors of humanity opted for brains over brawn, speed, size, or any lesser adaptation. Whenever the option of intelligent response or pre-programmed reaction presented itself, a single choice was made: Be smart.

1. We crave meaty taste because the amphibian brain's hunger for flesh is older than the primate brain's "acquired taste" for fruits and nuts. 2. As it influenced the pursuit, handling, and killing of game, the amygdala also stimulated the release of digestive juices in preparation for eating the kill. Thus, today, hidden aggressiveness in the meat-eater's code makes a sizzling steak more exciting than a bowl of fruit. This explains, in part, why (when possible and affordable) meals throughout the world are planned around a meat dish.

In private life, human beings spend a great deal of time in seclusion behind closed doors (e.g., in bathrooms and bedrooms) and other partitions designed to shield their bodies from prying eyes. Scientists have determined that too much visual monitoring can be harmful to human health.

Yo-yo (Tagalog for "come back") evolved from a Philippine hunting tool made from a softball-size stone tied to a length of plant vine or a leather thong which enabled throwers to retrieve the weapon with a simple flick of the wrist (Hoffman 1996). The modern yo-yo thus has a great deal of physics, prehistory, and hunting lore encoded in its maple, beech, or plastic form (see below, Neuro-notes III).

The two-point rhythm of walking's stride clears the mind for thinking. (N.B.: Perhaps, after telling the spinal circuits to "take a walk," the forebrain shifts to automatic pilot, so to speak, freeing the neocortex to ponder important issues of the day.) Many philosophers were lifetime walkers, who found that bipedal rhythms facilitated creative contemplation and thought. In his short life, e.g., Henry David Thoreau walked an estimated 250,000 miles--ten times the circumference of earth.