SENSE). in which there is disturbance or de rangement of our space perceptions and relations.
they serve as a sense-organ: and the sensation of dizziness• unpleasant as it is. plays a useful part as a warring of spatial disorientation.
The above list gives the full tale of organic qualities, so far as known, with the single exception of pain (q.v.). It is character istic of the group that the sensation-, do not form closed systems of varied content, as do those of the most highly developed senses, sight and hearing, but stand out singly, as do the qualities of cutaneous and gustatory sensation in the ex. ternal or 'special sense' group. Whether further analysis will bring with it a greater differentia tion, so that there will prove to be a number of hunger qualities, a number of qualities of 'op pressed breathing.' etc.. we cannot say but stieh a result is improbable. Neither is it probabl • that qualities once separate have now fused, or that certain qualities have lapsed altogether. The organic sensations are processes of verN ancient origin, which (like the sensations of pressure, temperature, and taste) have with relatively little change as the organism has grown in complexity. They play an important part in systematic psychology. They form the
constant background of the psyehological and thus contribute largely toward the 'unity' or centralization of consciousness; they furnish the commonest sense-basis of the feelings; and they function:ae in a snrprisingly definite and au thoritative way in recognition and reproduction It may be added that 'efferent' or 'innervation' sensations, in all probability, do not exist. The 'effort' that we put forth in lifting a heavy ob ject is derived from memories, images. of pre vious liftings. and is not a new sensation aeemn panying the innervation of the arm muscles.
Binuotal.keit Y. Knipe, Outlines of Psychology, trans. (London, 1s95) : (;oldschehler. Gem/fa me/1e .lbhandlung,n, vol. ii. (Leipzig, Itins) ; Wundt, Physiologisehe Psychologie, vol. i.
s93) ; Sanford, Course in Eximrimen t rt Psychology ( 1 S9S 1 ; KrOner. Das dor perlichc ( Breslau, ititi ) ; Beauni,, Les sensations int, Imes (Paris, I SS!) ; Foster. Rook of Physiology, vol. iv. ( London. BO ) Titehener. Outline of Psychology (New York. IS99) ; id.. Expeeim(ntal Psychology 1!u)1 ).
See COMMON SENSATION: SC LE SENSE.