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]