Artificial Neural Nets Symbiosis between computer and cognitive sciences.

Artificial Neural NetsSymbiosis between computer and cognitive sciences

Cajal -1-

Cajal Golgi

Cajal + Golgi indentification of independent neurons by staining, microscopy and looking. (Nobel Prize 1906)

Cajal -2-

6

Investigation of Single Neurons

Microelectrode recording of Biological Neuron activation using tungsten electrode

Hubel and Weisel. Nobel Prize 1958

Photomicrograph: Height = 1mm.

Medical Diagnosis

Symptoms Diagnosis

Cough Headache No Illness Pneumonia Flu Meningitis

0 0 1

0 1 1

1 0 1

1 1 1

Concepts and Philosophy 10CBP 2006-7

ANN Medical Diagnosis

Cough

Headache

No Illness

Pneumonia

Flu

Meningitis

1Cough

Headache 1 Flu

1

“Classical” Medical Diagnosis

If ( (symptom ! = cough) && (symptom != headache) )

illness = no illness;

else if ( (symptom ! = cough) && (symptom == headache) )

illness = meningitis;

else if ( (symptom == cough) && (symptom != headache) )

illness = pneumonia;

else if ( (symptom == cough) && (symptom == headache) )

illness = flu;

Rule-based Learning “ if … then …. else … “