Specifying axis title for a specific tick mark range

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I am plotting an adjacency matrix using MATLAB and I would like to specify one axis title for a specific range of tick marks and a different axis title for a different range of tick marks within the same axis. So for example, label the ticks from 0 - 180 as "Left hemisphere" and 180-360 as "Right Hemishphere" for both the x and y axes. I have shown my current code below. How would I go about doing this?

M = importdata('correlation.txt')
imagesc(M); % plot the matrix
hold on
xticks([0 180 360])
yticks([0 180 360])
title('Functional Connectivity', 'FontSize', 14); % set title
colormap('jet'); % set the colorscheme
colorbar; % enable colorbar
hold off