Microsurgical Anatomic Features of the Olfactory Nerve: Relevance to Olfaction Preservation in the Pterional Approach

2006 ◽  
Vol 2006 ◽  
pp. 300-301
Author(s):  
S.R. Gibbs
Keyword(s):  
Olfactory Nerve ◽  
Pterional Approach ◽  
Olfaction Preservation

Microsurgical Anatomic Features of the Olfactory Nerve: Relevance to Olfaction Preservation in the Pterional Approach

2005 ◽  
Vol 57 (suppl_1) ◽  
pp. 17-21 ◽  
Author(s):  
Salvatore Cardali ◽  
Alberto Romano ◽  
Filippo Flavio Angileri ◽  
Alfredo Conti ◽  
Domenico La Torre ◽  
...  
Keyword(s):  
Frontal Lobe ◽  
Average Length ◽  
Dorsal Surface ◽  
Middle Cranial Fossa ◽  
Olfactory Nerve ◽  
Pterional Approach ◽  
Posterior Portion ◽  
Subarachnoidal Space ◽  
Cranial Fossa ◽  
Olfaction Preservation

Abstract OBJECTIVE: The pterional approach represents the standard approach for most lesions of the anterior and middle cranial fossa. It requires some degree of frontal lobe retraction, which may result in temporary or permanent damage of olfaction because of nerve avulsion or mechanical compression. The purpose of this study, based on microanatomic dissection of human cadaveric specimens, was to review the microsurgical anatomic features of the nerve and suggest operative nuances that may contribute to reducing the rate of postoperative olfactory dysfunction. METHODS: Twenty olfactory nerves and tracts were examined in 10 human cadaveric heads obtained from three fresh and seven formalin-fixed adult cadavers. A standard pterional craniotomy was performed. The olfactory nerve was dissected from its arachnoidal envelopes and then mobilized for an average length of 30 mm (range, 25–35 mm). RESULTS: The possible retraction of the frontal lobe was 10 to 15 mm. More retraction invariably resulted in nerve disruption. CONCLUSION: The standard sylvian and basal cistern opening may be insufficient to guarantee preservation of olfactory function. Early identification and arachnoidal dissection of the nerve may reduce the rate of olfaction compromise. The opening of the subarachnoidal space should be performed in a proximal-to-distal manner to allow early visualization of the olfactory bulb and its dissection. The arachnoidal dissection should be performed with sharp instruments, avoiding any traction on the posterior portion of the olfactory tract. Any direct retractor compression should also be avoided to spare the microvasculature lying on the dorsal surface of the nerve.

Removal of Intracranial K-Wire through Combined Endoscopic and Pterional Approach

2020 ◽  
Author(s):  
Reginald Fong ◽  
Christoph Griessenauer ◽  
Andrew Conger
Keyword(s):  
Pterional Approach

A Less Invasive Pterional Approach to an Unruptured Cerebral Aneurysm

2006 ◽  
Vol 34 (6) ◽  
pp. 389-394 ◽  
Author(s):  
Kazuhiro YOKOYAMA ◽  
Hiroshi NOGUCHI ◽  
Yoshitomo UCHIYAMA ◽  
Hiroshi YOKOTA ◽  
Toshisuke SAKAKI
Keyword(s):  
Cerebral Aneurysm ◽  
Pterional Approach ◽  
Less Invasive ◽  
Unruptured Cerebral Aneurysm

Olfactory mucosal and neural responses in the frog

1962 ◽  
Vol 203 (2) ◽  
pp. 353-358 ◽  
Author(s):  
Maxwell Mark Mozell
Keyword(s):  
Stimulus Intensity ◽  
Olfactory Epithelium ◽  
Flow Rate ◽  
Olfactory Nerve ◽  
Neural Responses ◽  
Criterion Measure ◽  
Repeated Stimulation ◽  
Two Measures ◽  
Electrophysiological Technique

A comparatively recent electrophysiological technique for studying peripheral olfactory events is to record sustained negative potentials from the olfactory epithelium. This method is rapidly replacing the older technique of recording multifiber discharges from the olfactory nerve or bulb. Therefore, the extent to which the results from the two methods correlate with each other was studied by simultaneously recording from the nerve and from the mucosa under several conditions. Although most often parallel, some differences between the two measures were found. Their response maxima did not always temporally coincide. Their amplitudes did not always correlate. Certain stimuli reduced subsequent mucosal responses but not the neural. Repeated stimulation sometimes produced similar differences. Finally, the two responses were not linearly related as a function of stimulus intensity or flow rate. However, for reasons discussed, it is difficult to conclude that these discrepancies necessarily reflect unfavorably upon the reliability of the mucosal potential as the criterion measure of peripheral olfactory activity. Nevertheless, the mucosal potential should not be accepted unequivocally as such a criterion measure until it is more thoroughly understood.

The Relationship of Particle Size to Olfactory Nerve Uptake of a Non-Soluble Form of Manganese Into Brain

2002 ◽  
Vol 23 (2) ◽  
pp. 177-183 ◽  
Author(s):  
Laurence D. Fechter ◽  
David L. Johnson ◽  
Robert A. Lynch
Keyword(s):  
Particle Size ◽  
Olfactory Nerve ◽  
Soluble Form ◽  
Relationship Of ◽  
The Relationship

Pterional Approach for Surgical Treatment of Olfactory Groove Meningiomas

Neurosurgery ◽  
1989 ◽  
Vol 25 (6) ◽  
pp. 942-947 ◽  
Author(s):  
W. Hassler ◽  
J. Zentner
Keyword(s):  
Surgical Treatment ◽  
Superior Sagittal Sinus ◽  
Cerebrospinal Fluid Fistula ◽  
Pterional Approach ◽  
Olfactory Groove ◽  
Sagittal Sinus ◽  
Frontal Brain ◽  
Bridging Veins ◽  
Frontal Sinuses ◽  
Fluid Fistula

Abstract We present our experience with the surgical treatment of olfactory groove meningiomas using a pterional approach. This approach provides the advantages of previous techniques, such as preserving the frontal brain and superior sagittal sinus, early devascularization of the tumor, and late dissection of tumor borders. Moreover, it also compensates for the shortcomings of other techniques, e.g., compression of frontal bridging veins, late dissection of dorsal tumor aspects involving vessels and optic nerves as well as facultative infection and cerebrospinal fluid fistula-related complications caused by opening of frontal sinuses. To date, 11 patients were treated in this way. As we encountered no surgical complications in our series we are encouraged to present our procedure.

Sign in / Sign up

Export Citation Format

Share Document