maandag 3 augustus 2015

Grawlixes, frontal lobe, ganglia and automatism.

"The replacement of the complex actions programs by a well-consolidated stereotype, quite unrelated to the basic program, is the most typical feature of the disturbances of voluntary activity in this group of patients.(..)
If a lesion of the frontal lobes spreads into the deep zones of the frontal region to affect the subcortical ganglia and to disturb the inhibition of primitive automatisms, the task of drawing a simple figure is easily interrupted by the revival of elementary motor automatism; having started to perform a particular task, the patient is unable to give up, and the performance of the action is interrupted by bursts of uncontrollable automatism." (my italics)

from: Alexandr Romanovich Luria. Higher Cortical Functions in Man 

zondag 26 juli 2015



vrijdag 20 maart 2015

Ideal Flow

The art and science of early computational models by Aldo Giorgini

A project by Esteban Garcia Bravo and Tim McGraw - Purdue University

Simulating is a way of learning and deeply understanding natural phenomena. In the mid 1960s, scientists started to use computers to visualize complex mathematical models to further understand the behavior of large bodies of water. At Purdue University, Aldo Giorgini created algorithms to simulate turbulence and other water perturbations beginning in 1967 as part of his research at the School of Civil Engineering. The resulting visual outputs awoke Giorgini's inner artist and motivated him to incorporate the computer-based water simulations as the base for his compositions. This research analyzed primary sources (manuscripts, software documentation and artifacts) found at Giorgini's estate and revisited Giorgini's contribution developing a WebGL interactive application.


Protean strategies

Protean defence by prey animals
D. A. Humphries,P. M. Driver

"Attention is drawn to the widespread occurrence ofprotean phenomena, in which the appearance and behaviour of prey animals are rendered variable and irregular, as a weapon in the biological arms race between predators and their prey. Protean behaviour is defined as that behaviour which is sufficiently unsystematic to prevent a reactor predicting in detail the position or actions of the actor."

spiral movement in man

spiral movement in man -- aa shaeffer 1928

 aa shaeffer 1928

Blindfolded persons walk, run, swim, row, and drive automobiles in clock-spring spiral paths of greater or less regularity when attempting a straightaway. The spirals turn either right or left in one and the same individual, and may do so even in one experiment. But either right or left turns predominate in the great majority of individuals, often to a high degree. The paths show marked individuality, and there is some ground for thinking there exists a correlation between temperamental differences and general character of path.

The mechanism which produces the spiral path is not located in the locomotor organs, but in the central nervous system and is probably identical essentially with the spiral mechanism in other motile organisms, all of which move in spiral paths when there are no guiding senses to direct the path. The clock-spring spiral in man is interpreted as the expression in two dimensions of space of a helical spiral mechanism which seems to exist in all motile organisms moving in three dimensions of space and in amebas which move in two dimensions. In a large number of lower organisms the number of body lengths per spiral turn is almost constant, being about 4.5. The smallest regular swimming spirals in man are very close to this value, but the smallest regular walking spirals are somewhat larger. The fundamental spiral mechanism seems to be of molecular dimensions, and there seems to exist a demonstrable locomotor bilateral asymmetry in very nearly, if not quite, all organisms.


vrijdag 30 januari 2015

Greg Borenstein; Homunculus

from; ideas for dozens

"Homunculus is a video self-portrait that explores facial expressions and physical performance. In it, I use the position of my body to puppet a 3D model of my own head. Each limb is mapped to a particular part of the face that plays a role in determining the emotional expressiveness of a facial expression: my hands control my brows, my knees control the corners of my mouth, etc."

Homunculus from Greg Borenstein on Vimeo.