[- 5 * 3 
fo of caufing confuted Motions in feverai Parts at a 
time, like an Epilepfy ? Or if an Impuife be made on 
the Trunk of a Nerve, the Divifions ought all to 
be iubjed to the Fifed of that Impulfe„ It wiil there- 
fore be better for our Purpofe to think the Mind 
makes her Impuife where fhe plcafes, and chufes 
that Part of a Nerve only that leads to the particular 
Mufgle to be moved. 
XIII. 
This fee-ms to be corroborated greatly by the Mo- 
tions we fee in Infeds after being cut to Pieces, as 
Worms, Flies, <&c. and in more perfed Animals, as 
Poultry, Frogs, &c. which move, and fhew Signs of 
Pain, a confiderahle time after their Heads are cut 
off$ which could not happen, if the Impuife was 
only made in the Brain. We can carry this Argu- 
ment yet further, even to human Nature, if what 
1 Diemerbroeck * relates be true : He fays he faw a 
Man executed at Leyden > who, after his Head was 
Truck off, rofe upon his Feet, and flood for a little 
Time. And Dr. Stuarfs Experiment upon the 
Frog (which is, after the Head is cut off, and the 
.Limbs hanging loofe, to comprcfs the fpinal Marrow 
with the End of a Probe made flat, whereby the 
Limbs are immediately contraded, and with fome 
Violence) fhews, that if the Impuife was made in 
the Brain, the Motion would be confufed and gene- 
ral ; flnee all the lower Parts were moved by the 
Angle 
* Anat. corp. hu?n. lib. viii. cap. i. ds nerv.] 
