Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: About the Neuronal Mechanism of Lateral Hypothalamic Self-Stimulation
  Response   The experimental part of this study has shown that hunger motivation may be
evoked by a long-term (10=180 s) continuous electrical stimulation of the
"hunger center" at a current of 133.6{\pm}8.1 mkA. Positive emotions were
caused by electrostimulation at the same current intensity but short-term
duration (0.3-0.5 s). A positive feeling elicited by electrostimulation of the
motivation center can be explained in terms of the adaptation (polarization)
theory of motivation and emotion (Murik, 2001, 2005).

30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex