  We study theoretically the baryon spectra in terms of a deformed oscillator
quark (DOQ) model. This model is motivated by confinement of quarks and chiral
symmetry breaking, which are the most important non-perturbative phenomena of
QCD. The minimization of the DOQ hamiltonian with respect to the deformation
for each principal quantum number results in deformations for the intrinsic
states of excited baryonic states. We find that the resulting baryon spectra
agree very well with the existing experimental data. The spatial deformation of
the baryonic excited states carry useful information on the quark confinement
and provide a clue to understand the confining mechanism.
