
Originally Posted by
vince25
...I have two questions concerning the "nod". Where did it start?
An explanation from The Nonverbal Dictionary:
Rhythmically raised and lowered, the head-nod is an affirmative cue, widely used throughout the world to show understanding, approval, and agreement.
Though other types of affirmative head movements have been observed cross-culturally (LaBarre 1947), the affirmative head-nod is well-documented as a nearly universal indication of accord, agreement, and understanding (Darwin 1872; Eibl-Eibesfeldt 1970, 1971; Morris 1994). 2. "Others see it [the head-nod] as an abbreviated form of submissive body-lowering - in other words, as a miniature bow" (Morris 1994:142).
Moreover, the accessory nerve (cranial XI, which innervates trapezius), has a relationship with the vagus nerve (cranial X, which innervates the larynx in producing "hmm," "uh huh," and other "digestive" vocalizations). Thus, the affirmative head-nod may reflect an agreeable response to food. 3. Regarding the emphatic head-nod, the strong physical emphasis during its downward phase suggests a separate origin from the "yes" nod, which begins with an upward motion.

Originally Posted by
vince25
Second question, why do MOST cruisers not do it?
I don't believe you can stereotype cruisers cos I had two nod at me today!

You'll find that sprotsbike riders wave/nod at eachother more frequently because they are of the same breed, likewise cruisers I suppose. At the end of the day it comes down to the individual and what mood they are in at the time will determine whether or not they acknowledge the oncoming rider!
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