| Flap 1 | Flap 2 |
| Olfactory (I) | olfactory epithelium - cribriform plate of ethmoid bone - olfactory bulb - primary olfactory cortex |
| Optic (II) | retina - optic canals - partial decussation at optic chiasm - optic tracts - thalamus ( - optic radiation fibers - primary visual cortex) |
| Oculomotor (III) | ventral midbrain - superior orbital fissures - 4 of 6 extrinsic eye muscles (per eye) |
| Trochlear (IV) | dorsal midbrain - superior orbital fissures - superior oblique muscles |
| Trigeminal (V) | V1: face - superior orbital fissure - pons<br>V2: face - foramen rotundum - pons<br>V3: face - foramen ovale - pons |
| Abducens (VI) | inferior pons - superior orbital fissures - lateral rectus muscles |
| Facial (VII) | pons - internal acoustic meatus - stylomastoid foramen - lateral aspect of face - separates into 5 branches:<br> 1. temporal<br> 2. zygomatic<br> 3. buccal<br> 4. mandibular<br> 5. cervical |
| Vestibulocochlear (VIII) | inner ear - internal acoustic meatus - pons/medulla border |
| Glossopharyngeal (IX) | medulla - jugular foramen - throat |
| Vagus (X) | medulla - jugular foramen - all over |
| Accessory (XI) | cranial root: medulla - joins with spinal root - jugular foramen<br>spinal root: cervical spine - foramen magnum - joins with cranial root - jugular foramen |
| Hypoglossal (XII) | medulla - hypoglossal canal - tongue |
