1 – Posterior basal segment [SX]; 2 – Lateral basal segment [SIX]; 3 – Anterior basal segment [SVIII]; 4 – Medial basal segment [SVII]; 5 – Medial segment [SV]; 6 – Superior segment [SVI]; 7 – Anterior segment [SIII]; 8 – Apical segment [SI]; 9 – Posterior segment [SII];
10 – Lateral segment [SIV]