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Microsurgical anatomical study on cranial nerves via cavernous sinus and its clinical significance

Yin Jia

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Abstract

Objective: To provide anatomical basis for direct microsurgical operation of cranial nerves (CN) via cavernous sinus and sellar area by observing the microanatomical relationship of these structures. Methods: Thirty adult cadaveric head specimens were dissected in detail under operating microscope. Results: Most posterior part of CN via cavernous sinus was located in the lateral wall and was easy to be distinguished. The Parkinson incision can be extend forward further. The CN went ahead continuously below the anterior clinoid process(ACP). The CN can be injured easily during drilling the ACP via clinoid space(CS) approach. The distances from the oculomotor nerve and trochlear nerve to ACP were smallest which were 0.64±0.22 (0.26～1.08)mm and 0.55±0.06 (0.16～0.96)mm respectively. Conclusion: The above data are useful to microsurgical operation of CN.

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What this paper is about

Objective: To provide anatomical basis for direct microsurgical operation of cranial nerves (CN) via cavernous sinus and sellar area by observing the microanatomical relationship of these structures. Methods: Thirty adult cadaveric head specimens were dissected in detail under operating microscope. Results: Most posterior part of CN via cavernous sinus was located in the lateral wall and was easy to be distinguished. The Parkinson incision can be extend forward further. The CN went ahead continuously below the anterior clinoid process(ACP). The CN can be injured easily during drilling the ACP via clinoid space(CS) approach. The distances from the oculomotor nerve and trochlear nerve to ACP were smallest which were 0.64±0.22 (0.26～1.08)mm and 0.55±0.06 (0.16～0.96)mm respectively. Conclusion: The above data are useful to microsurgical operation of CN.

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Available abstract

Objective: To provide anatomical basis for direct microsurgical operation of cranial nerves (CN) via cavernous sinus and sellar area by observing the microanatomical relationship of these structures. Methods: Thirty adult cadaveric head specimens were dissected in detail under operating microscope. Results: Most posterior part of CN via cavernous sinus was located in the lateral wall and was easy to be distinguished. The Parkinson incision can be extend forward further. The CN went ahead continuously below the anterior clinoid process(ACP). The CN can be injured easily during drilling the ACP via clinoid space(CS) approach. The distances from the oculomotor nerve and trochlear nerve to ACP were smallest which were 0.64±0.22 (0.26～1.08)mm and 0.55±0.06 (0.16～0.96)mm respectively. Conclusion: The above data are useful to microsurgical operation of CN.

Key concepts: Cavernous sinus, Cadaveric spasm, Anatomy, Trochlear nerve, Oculomotor nerve, Operating microscope, Microsurgery, Cadaver

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