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cavernous_sinus_triangles

Cavernous sinus triangles

There are 10 major anatomic triangles of the cavernous sinus and middle cranial fossa. The first was described by D. Parkinson in 1965, and this scheme has been expanded upon by many microanatomists to allow for safe and consistent approaches to the petrous and cavernous carotid, contents of the labyrinth and IAC, and lesions of the cavernous sinus.


1. Clinoidal (Anteromedial) Triangle · Borders: 1. Optic Nerve 2. Occulomotor Nerve 3. Tentorial Edge · Contents: 1. Anterior Clinoid Process 2. Clinoidal ICA

2. Oculomotor (Medial or Hakuba's) Triangle · Borders: 1. Anterior petroclinoid dural fold.

2. Posterior petroclinoid dural fold. 3. Interclinoid dural fold. · Contents: 1. Occulomotor Nerve 2. Horizontal Segment of ICA

3. Supratrochlear (Paramedian) Triangle · Borders: 1. Occulomotor Nerve 2. Trochlear Nerve 3. Tentorial Edge · Contents: 1. Meningohypophyseal Trunk

4. Parkinson's triangle.

Middle Fossa Triangles

5. Anteromedial (Mullan's) Triangle · Borders: 1. Opthalmic Nerve (V1) 2. Maxillary Nerve (V2) 3. A line connecting Superior Orbital Fissure and Foramen Rotundum · Contents: 1. Sphenoid Sinus 2. Opthalmic Vein 3. Abducens Nerve

6. Anterolateral Triangle · Borders: 1. Maxillary Nerve (V2) 2. Mandibular Nerve (V3) 3. A line connecting Foramen Rotundum and Foramen Ovale · Contents: 1. Lateral sphenoid wing 2. Spenoid emmissary vein 3. Cavernous-Pterygoid Venous Anastamosis Middle_fossa_triangles Parkinson's (Infratrochlear) Triangle 3

7. Posterolateral (Glasscock's) Triangle · Borders: 1. Mandibular Nerve (V3) 2. Greater Superficial Petrosal Nerve 3. A line from Foramen Spinosum to Arcuate Eminence · Contents: 1. Foramen Spinosum 2. Horizontal Petrous ICA (for anastamosis) 3. Infratemporal Fossa

8. Posteromedial (Kawase's) Triangle This area is also known as The Rhomboid. Removal of the petrous bone within this triangle/quadrangle is an anterior petrosectomy. · Borders: 1. Mandibular Nerve (V3) 2. GSPN 3. Arcuate Eminence 4. Superior Petrosal Sinus -or- 1. GSPN 2. Arcuate Eminence 3. A line connecting the hiatus fallopii and Meckel's Cave · Contents: 1. Petrous Apex 2. IAC 3. Vertebrobasilar Junction Contains cochlea. 9. Inferolateral Triangle · Borders: 1. A line from the dural entries of the Trochlear and Abducens Nerve 2. A line from the dural entries of the Abducens Nerve and the Petrosal Vein 3. The petrous apex Middle_fossa_triangles Posterolateral (Glasscock's) Triangle

· Contents: 1. Porous Trigeminii (Dural opening into Meckel's Cave)

10. Inferomedial Triangle · Borders: 1. A line from the dural entries of the Trochlear and Abducens Nerve 2. A line from the dural entries of the Abducens Nerve and the Posterior Clinoid 3. The petrous apex · Contents: 1. Porous Abducens (Dural opening into Dorello's Canal) 2. Gruber's Ligament

cavernous_sinus_triangles.txt · Last modified: 2017/12/27 13:56 by administrador