Sin título 1

Covariance matrix(S)–>In diagonal it have variances (spread) and in off-daigonal covariances (pos and orientation). Measure the linera dependency between observations of each pair of vars. Its rank determines the number of linearly independent variables in the data matrix and it is also the number of eigenvalues different from 0.  >varaince — >spread — <>Generalizated variance (|S|)–> When |S|=0 there are some variables that are linear combinations of the others. If eigenvector

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1.Dorsal and ventral stream.

Dorsal stream: stream of processing ascends from the occipital cortex to the parietal cortex and is involved in spatial awareness and action. It is often referred to as the ‘where’ or ‘how’ pathway because of its functions. Ventral stream:  Also known as the ventral pathway, this stream of processing descends from the occipital cortex to the inferior temporal cortexand is involved in objects recognition. It is often referred to as the ‘what’ pathway owing

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