Anatomic relationship of nasolacrimal duct and major lateral wall landmarks: cadaveric study with surgical implications

2014 ◽  
Vol 4 (8) ◽  
pp. 684-688 ◽  
Author(s):  
Mohammad Javed Ali ◽  
Jayakar V. Nayak ◽  
Reza Vaezeafshar ◽  
Gang Li ◽  
Alkis James Psaltis
Keyword(s):  
Lateral Wall ◽  
Nasolacrimal Duct ◽  
Cadaveric Study ◽  
Relationship Of ◽  
Anatomic Relationship

Anatomic relationship of the first olfactory neuron and trochlea: cadaveric study with surgical implications

2017 ◽  
Vol 7 (11) ◽  
pp. 1085-1088
Author(s):  
Philip Locker ◽  
Max Plitt ◽  
Peter Papagiannopoulos ◽  
Ryan Smith ◽  
Bobby A. Tajudeen
Keyword(s):  
Cadaveric Study ◽  
Olfactory Neuron ◽  
Relationship Of ◽  
Anatomic Relationship

Anatomic Relationship of the Optic Radiations to the Atrium of the Lateral Ventricle: Description of a Novel Entry Point to the Trigone

2008 ◽  
Vol 63 (suppl_4) ◽  
pp. ONS195-ONS203 ◽  
Author(s):  
Kelly B. Mahaney ◽  
Saleem I. Abdulrauf
Keyword(s):  
Lateral Ventricle ◽  
Lateral Wall ◽  
Freezing And Thawing ◽  
Point Of Entry ◽  
Lingual Gyrus ◽  
Temporal Horn ◽  
Meyer’S Loop ◽  
Relationship Of ◽  
Optic Radiations ◽  
Anatomic Relationship

Abstract Objective: The aim of this study was to delineate the anatomic relationship of the optic radiations to the atrium of the lateral ventricle using the Klingler method of white matter fiber dissection. These findings were applied to define a surgical approach to the trigone that avoids injury to the optic radiations. Methods: Sixteen cadaveric hemispheres were prepared by several cycles of freezing and thawing. With the use of wooden spatulas, the specimens were dissected in a stepwise fashion. Each hemisphere was dissected first from a lateromedial direction and then from a mediolateral approach, and careful attention was given to the course and direction of the optic radiation fibers at all points from Meyer’s loop to their termination at the cuneus and the lingual gyrus. Results: In all 16 dissected hemispheres, the following observations were made: 1) the entire lateral wall of the lateral ventricle—from the temporal horn to the trigone to the occipital horn—is covered by the optic radiations; and 2) the medial wall of the lateral ventricle in the area of the trigone is entirely free of the optic radiations. Conclusion: The results of this study confirm that the medial parieto-occipital interhemispheric approach to the ventricular trigone will avoid injury to the optic radiations and the calcarine cortex. The authors describe the most direct trajectory to the ventricular trigone using this approach and propose a point of entry that transects the cingulate gyrus at a point 5 mm superior and 5 mm posterior to the falcotentorial junction.

The Anteromedial Triangle: The Risk for Cranial Nerve Ischemia at the Cavernous Sinus Lateral Wall. Anatomic Cadaveric Study

Skull Base ◽  
2009 ◽  
Vol 19 (01) ◽  
Author(s):  
Michele Conti ◽  
Daniel Prevedello ◽  
Andreas Schwarz ◽  
Roger Robert ◽  
Amin Kassam
Keyword(s):  
Cavernous Sinus ◽  
Cranial Nerve ◽  
Lateral Wall ◽  
Cadaveric Study

The Hallux Metatarsophalangeal Capsule: An Anatomic Study With Respect to Percutaneous Hallux Valgus Correction

2021 ◽  
pp. 107110072110272
Author(s):  
Kenneth M. Chin ◽  
Nicholas S. Richardson ◽  
John T. Campbell ◽  
Clifford L. Jeng ◽  
Matthew W. Christian ◽  
...  
Keyword(s):  
Minimally Invasive ◽  
Hallux Valgus ◽  
Metatarsal Head ◽  
Cadaveric Study ◽  
Anatomic Study ◽  
Orthopedic Surgeons ◽  
Popular Knowledge ◽  
Fresh Frozen ◽  
The Mean ◽  
Anatomic Relationship

Background: Minimally invasive surgery for the treatment of hallux valgus deformities has become increasingly popular. Knowledge of the location of the hallux metatarsophalangeal (MTP) proximal capsular origin on the metatarsal neck is essential for surgeons in planning and executing extracapsular corrective osteotomies. A cadaveric study was undertaken to further study this anatomic relationship. Methods: Ten nonpaired fresh-frozen frozen cadaveric specimens were used for this study. Careful dissection was performed, and the capsular origin of the hallux MTP joint was measured from the central portion of the metatarsal head in the medial, lateral, dorsal, plantarmedial, and plantarlateral dimensions. Results: The ten specimens had a mean age of 77 years, with 5 female and 5 male. The mean distances from the central hallux metatarsal head to the MTP capsular origin were 15.2 mm dorsally, 8.4 mm medially, 9.6 mm laterally, 19.3 mm plantarmedially, and 21.0 mm plantarlaterally. Conclusion: The MTP capsular origin at the hallux metatarsal varies at different anatomic positions. Knowledge of this capsular anatomy is critical for orthopedic surgeons when planning and performing minimally invasive distal metatarsal osteotomies for the correction of hallux valgus. Type of Study: Cadaveric Study.

Dynamic Anatomic Relationship of the Esophagus and Trachea on Sonography

2012 ◽  
Vol 31 (9) ◽  
pp. 1365-1370 ◽  
Author(s):  
James W. Tsung ◽  
Daniel Fenster ◽  
David O. Kessler ◽  
Joseph Novik
Keyword(s):  
Relationship Of ◽  
Anatomic Relationship

scholarly journals Anatomic relationship of the proximal nail matrix to the extensor hallucis longus tendon insertion

2015 ◽  
Vol 29 (10) ◽  
pp. 1967-1971 ◽  
Author(s):  
P. Palomo López ◽  
R. Becerro de Bengoa Vallejo ◽  
D. López López ◽  
J.C. Prados Frutos ◽  
J. Alfonso Murillo González ◽  
...  
Keyword(s):  
Longus Tendon ◽  
Nail Matrix ◽  
Extensor Hallucis Longus ◽  
Tendon Insertion ◽  
Relationship Of ◽  
Anatomic Relationship

Minimally Invasive Dorsal Cheilectomy of the First Metatarsal: A Cadaveric Study

2018 ◽  
Vol 39 (12) ◽  
pp. 1497-1501 ◽  
Author(s):  
Kar Hao Teoh ◽  
Esten Konstad Haanaes ◽  
Saud Alshalawi ◽  
Hiro Tanaka ◽  
Kartik Hariharan
Keyword(s):  
Minimally Invasive ◽  
Average Distance ◽  
Cadaveric Study ◽  
Invasive Technique ◽  
Optimal Position ◽  
First Metatarsal ◽  
Below The Knee ◽  
Fresh Frozen ◽  
Stab Incision ◽  
Relationship Of

Background: Minimally invasive dorsal cheilectomy (MIDC) for hallus rigidus is gaining in popularity. The optimal position for the stab incision for MIDC is dorsomedial to allow an ergonomic sweeping movement of the burr, potentially putting the dorsomedial cutaneous nerve (DMCN) to the hallux at risk. We aimed to quantify the risk of using this minimally invasive technique with a cadaveric study. Methods: A total of 13 fresh-frozen cadaveric specimens amputated below the knee were obtained for this study. After the procedure, the specimens were dissected, and structures were inspected for damage. Results: The DMCN to the hallux was cut completely in 2 specimens (15%). All the extensor hallucis longus tendons were intact, although in 1 specimen, the tendon showed some fraying on the underside of the tendon. The average distance of the stab incision from the first metatarsophalangeal (MTP) joint was 17.7 (range, 10-23) mm. The relationship of the DMCN to the stab incision was variable. The average distance of the DMCN to the incision was 3.8 (range, 0-7) mm. The danger zone for damaging the DMCN was at one-third the length of the first metatarsal proximal to the first MTP joint. Conclusion: The DMCN has been well studied by several authors and has a variable course. This nerve was damaged in 15% of our specimens following MIDC. Clinical Relevance: We believe patients should be made aware of this risk when considering surgery. A carefully made working capsular pocket for the burr and marking this nerve before making the incision if palpable could mitigate this risk.

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