Sound Mind: Or, Contributions to the natural history and physiology of the human intellectHaslam, John
Science
Sound Mind: Or, Contributions to the natural history and physiology of the human intellect
Haslam, John
Intellect; Mental health
From the brief notice which has been bestowed on this subject, it will
be seen, that man could have made but inconsiderable advances in the
scale of intellectual progression, by speech alone;--that how much
soever this faculty might have elevated him above animals, by endowing
his perceptions with intelligence, and rendering his thoughts the
circulating medium of his community; yet had he remained without the
power of registering the edicts of his mind, language would have expired
in its cradle; and as the body mingles with its mother-earth,
intelligent sound would have been blended and lost in the medium that
produced it.
The next subject to be considered, (and its importance will justify an
ample review, and minute consideration,) is the hand; a member which may
be considered, with some trifling exceptions, as exclusively bestowed on
man. The wonderful construction of this part of the human body might be
sufficiently exemplified by its achievements. Its anatomy has not,
hitherto, been so minutely investigated, as to demonstrate the almost
infinite variety of motions to which it is adapted; nor has it been
sufficiently compared with the somewhat analogous structure and function
in certain of the simiae, in the claw of the parrot, or with the
proboscis of the elephant.
At the extremity of the fingers, in the human hand, and on their inner
surface, resides the organ of Touch; a sense, of which animals are
comparatively deficient. Touch, is distinguished from feeling, which it
is the general property of all the nerves to convey, and this feeling is
likewise accompanied with consciousness. Thus pain may be felt in the
different organs of sense, without any corresponding perception, which
it is their separate office to import. Although the acute organ of touch
has its seat at the extremity of the fingers, yet the whole surface of
the skin (of the human subject) is susceptible, but in an inferior
degree, of tangible perceptions. It is sensible of heat and cold, of
hard and soft, rough and smooth. The tongue enjoys also a considerable
capability of tangible discrimination; but let any person attempt to
ascertain the state of his pulse, by applying the tongue to the wrist,
he will find it a very unsatisfactory test.[4]
Public-domain text, read in full here on John Shaqi.
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