Page:Observations on Man 1834.djvu/16

 The uniformity, continuity, softness, and active powers of the medullary substance 10

The manner in which vibrations are communicated to the whole medullary substance 13

Presumptions in favour of the doctrine of vibrations 16

Corollaries from this doctrine 20

Materiality of the soul no consequence of it 21

Phenomena of sensible pleasure and pain agreeable to the doctrine of vibrations 22

Phenomena of sleep agreeable to the doctrines of vibrations 28

Sect. II.

Ideas, their Generation and Associations, and the Agreement of the Doctrine of Vibrations with the Phenomena of Ideas.

The generation of the ideas of sensation 36

The repetition of sensory vibrations generates a disposition to corresponding vibratiuncles or miniature vibrations 37

The power of raising ideas by association in the simplest case 41

The power of raising miniature vibrations by association in the simplest case 43

The formation of complex ideas by association 46

The formation of complex miniature vibrations by association 50

The complex vibrations last-mentioned may be so exalted, in some cases, as to be no longer miniatures, but equal in strength to sensory vibrations 51

Sect. III.

Muscular Motion, and its two Kinds, automatic and voluntary; and the Use of the Doctrines of Vibrations and Association, for explaining these respectively.

It is probable, that muscular motion is performed by the same general means as sensation, and the perception of ideas 54

Phaenomena of muscular contraction agreeable to the doctrine of vibrations 56

Propensity of the muscles to alternate contraction and relaxation agreeable to the doctrine of vibrations 57

The origin of motory vibrations 58