scholarly journals Temporal Bone Landmarks of the Transversesigmoid Sinus Junction: An Anatomical Study in Dried Human Skulls

2021 ◽  
Vol 73 (11) ◽  
pp. 738-743
Author(s):  
Thanawan Supawannawiwat ◽  
Chottiwat Tansirisithikul ◽  
Bunpot Sitthinamsuwan
Keyword(s):  
Temporal Bone ◽  
Anatomical Study ◽  
Intersection Point ◽  
Low Risk ◽  
Venous Sinus ◽  
Burr Hole ◽  
Bony Landmark ◽  
Inner Surface ◽  
Anatomical Relationship ◽  
Human Skulls

Objective: To investigate the accuracy in localization of the anterosuperior margin of TSSJ by using the intersection point between the squamosal and parietomastoid sutures (A point) and the intersection of the squamosal suture and supramastoid crest (B point) as bony landmarks.Materials and Methods: The A and B points were marked on the inner surface of a skull by using the transillumination technique. The anatomical relationship between the projected A point, B point, and groove of TSSJ was investigated in 60 dried Thai human skulls (120 sides).Results: Of the 120 sides, the projected A points were located exactly on the anterosuperior margin of the TSSJ in 38 (31.7%) instances and adjacent (above and below) the anterosuperior margin in 82 (68.3%) cases. Of the 118 sides with identifiable supramastoid crests, the projected B points were located precisely on the anterosuperior margin of TSSJ in 60 (50.8%) cases and above the anterosuperior margin of the TSSJ in 57 (48.3%) cases. Hence, the projected B point was a more reliable bony landmark for localizing the anterosuperior margin of the TSSJ when compared with the projected A point (p = 0.003, OR 2.2, and 95% CI =1.3-3.8).Conclusion: The B point is a more reliable temporal bone landmark for localization of the TSSJ than the A point. In temporal craniotomy, an initial burr hole at the B point is relatively safe and carries a very low risk of inadvertent venous sinus injury.

scholarly journals Anatomical and Morphometric Study of Optic Foramen in North Indian Population

2019 ◽  
Vol 08 (02) ◽  
pp. 053-056 ◽  
Author(s):  
Ajay Kumar ◽  
Alok Tripathi ◽  
Shilpi Jain ◽  
Satyam Khare ◽  
Ram Kumar Kaushik ◽  
...  
Keyword(s):  
Temporal Bone ◽  
Middle Cranial Fossa ◽  
Optic Canal ◽  
Morphometric Study ◽  
P Value ◽  
Transverse Diameter ◽  
Petrous Temporal Bone ◽  
Pass Through ◽  
Human Skulls ◽  
The Right

Abstract Introduction Optic canal connects orbit to middle cranial fossa. Optic nerve and ophthalmic artery pass through this canal. The aim of the present study is to make morphometric and anatomical observations of endocranial opening of optic canal. Materials and Methods The observations were conducted on 30 dry adult human skulls. The observations were made on shape, margins, confluence, septations, dimensions, and distance of optic foramen from apex of petrous temporal bone. Result and Statistical Analysis On morphometric observation, transverse diameter (TD) was 6.00 mm and 6.15 mm on the left and the right side, respectively. The vertical diameter (VD) was 5.14 mm on the left side and 4.82 mm on the right side. The distance of optic foramen to apex of petrous temporal bone was 21.84 mm on the left side and 21.90 mm on the right side. The mean, standard deviation, range, and p value were measured by using SPSS software version 19.00. Conclusion In the present study we attempt to provide a comprehensive anatomical and morphometric data of optic foramen that may help ophthalmologists and neurosurgeons during surgery.

Anatomical Study of the Medial Ankle Ligament Complex

2002 ◽  
Vol 23 (6) ◽  
pp. 547-553 ◽  
Author(s):  
Andreas Peter Boss ◽  
Beat Hintermann
Keyword(s):  
Individual Differences ◽  
In Vitro Study ◽  
Anatomical Study ◽  
Deltoid Ligament ◽  
Fibrous Layer ◽  
Ankle Ligament ◽  
Human Cadavers ◽  
Anatomical Relationship ◽  
Insertion Area

The purpose of this in vitro study was to determine insertion area, length and thickness of the various bundles and their anatomical relationship with inter-individual differences. Twelve ankles from human cadavers (ages 56 to 95 years, from nine men and three women) were dissected to the capsuloligamentous structures. Marked inter-individual differences were found for the five main ligaments (tibiospring, tibiocalcaneal, posterior and anterior deep tibiotalar and superficial posterior tibiotalar). The tibionavicular ligament is a thickened fibrous layer of the ankle capsule. The tibiocalcaneal and tibiospring ligaments are the longest, and the tibiocalcaneal and posterior deep tibiotalar ligaments are the thickest of these ligaments. Fibrils run in the direction of the tibia or dorsally. Knowledge of the deltoid ligament complex is necessary for anatomically and biomechanically correct reconstruction that provides stability without hazard to biomechanics of function.

scholarly journals Dural Septation on the Inner Surface of the Jugular Foramen: An Anatomical Study

2015 ◽  
Vol 76 (03) ◽  
pp. 214-217 ◽  
Author(s):  
R. Tubbs ◽  
Christoph Griessenauer ◽  
Muhammad Bilal ◽  
Joel Raborn ◽  
Marios Loukas ◽  
...  
Keyword(s):  
Anatomical Study ◽  
Jugular Foramen ◽  
Inner Surface

Modified Skin Incision and Location of Burr-Hole Surgery via a Retrosigmoid Approach: An Anatomical Study

2022 ◽  
Author(s):  
Lean Sun ◽  
Min Qi ◽  
Xuefei Shao ◽  
Sansong Chen ◽  
Xinyun Fang ◽  
...  
Keyword(s):  
Blood Vessels ◽  
Tissue Damage ◽  
Cerebellopontine Angle ◽  
Anatomical Study ◽  
Skin Incision ◽  
Sigmoid Sinus ◽  
Burr Hole ◽  
Retrosigmoid Approach ◽  
Positioning Method

Abstract Objective This study aims to reduce the tissue damage during craniotomy with retrosigmoid approach. A modified sickle-shaped skin incision was developed, and a new burr-hole positioning method was proposed. Methods Five adult cadaveric heads (10 sides) were used in this study. The sickle-shaped skin incision was performed during craniotomy. The nerves, blood vessels, and muscles were observed and measured under a microscope. Additionally, 62 dry adult skull specimens (left sided, n = 35; right sided, n = 27) were used to measure the distance between the most commonly used locating point (asterion [Ast] point) and the posteroinferior point of the transverse sigmoid sinus junction (PSTS) (Ast-PSTS), as well as the distance between the new locating O point and the PSTS (O-PSTS). Then, the reliability of the new locating O point was validated on the same five adult cadaveric heads (10 sides) used for the sickle-shaped skin incision. Results The sickle-shaped skin incision reduced the damage to the occipital nerves, blood vessels, and muscles during the surgery via a retrosigmoid approach. The dispersion and variability of O-PSTS were smaller than those of Ast-PSTS. Conclusion The sickle-shaped skin incision of the retrosigmoid approach can reduce the tissue damage and can completely expose the structures in the cerebellopontine angle. The modified O point is a more reliable locating point for a burr-hole surgery than the Ast point.

Anatomy of the Tarsal Canal and Sinus in Relation to the Subtalar Joint Capsule

2018 ◽  
Vol 39 (11) ◽  
pp. 1360-1369 ◽  
Author(s):  
Reiko Yamaguchi ◽  
Akimoto Nimura ◽  
Kentaro Amaha ◽  
Kumiko Yamaguchi ◽  
Yuko Segawa ◽  
...  
Keyword(s):  
Subtalar Joint ◽  
Anatomical Study ◽  
Joint Capsule ◽  
Anterior Capsule ◽  
Talocalcaneal Joint ◽  
Sinus Tarsi ◽  
Anatomical Relationship ◽  
Synovial Tissues ◽  
Fibrous Tissues ◽  
Tarsal Canal

Background: Anatomical knowledge of the tarsal canal and sinus is still unclear owing to the complexity of the ligamentous structures within them, particularly the relationship with the capsules of the subtalar joints. The aim of this study was to examine the anatomical relationship between the fibrous tissues of the tarsal canal and sinus and the articular capsules of the subtalar joint. Methods: We conducted a descriptive anatomical study of 21 embalmed cadaveric ankles. For a macroscopic overview of the subtalar joint, we removed the talus in 18 ankles and separated the fibrous tissues from the surrounding connective tissues to analyze the layered relationship between the inferior extensor retinaculum (IER) and the subtalar joint capsule. Additionally, we histologically analyzed the tarsal canal and the medial and lateral sides of the tarsal sinus using Masson’s trichrome staining in 3 ankles. Results: The medial and intermediate roots of the IER and interosseous talocalcaneal ligament (ITCL) were located in the same layer and were connected to each other, between the capsules of the posterior talocalcaneal and talocalcaneonavicular joints. The intermediate root of the IER and the cervical ligament (CL) had adjacent attachments on the tarsal sinus, and synovial tissues originating from the joint capsules filled the remaining area in the tarsal canal and sinus. Conclusion: We determined that the tarsal canal and sinus tarsi contained 3 layered structures: the anterior capsule of the posterior talocalcaneal joint, including the anterior capsule ligament; the layer of ITCL and IER; and the posterior capsule of the talocalcaneonavicular joint, including the CL. Clinical Relevance: The results of this study may help with the understanding of the pathomechanism of subtalar instability and sinus tarsi syndrome, resulting in better treatment.

scholarly journals Anatomical study of the pigs temporal bone by microdissection

2014 ◽  
Vol 29 (suppl 3) ◽  
pp. 77-80 ◽  
Author(s):  
Leandro de Borborema Garcia ◽  
José Santos Cruz de Andrade ◽  
José Ricardo Gurgel Testa
Keyword(s):  
Temporal Bone ◽  
Anatomical Study

scholarly journals POST-GLENOID FORAMEN: A RARE EMISSARY FORAMEN IN HUMAN SKULL

2020 ◽  
pp. 42-43
Author(s):  
PRIYA G ◽  
YASODAI R
Keyword(s):  
Pathological Condition ◽  
Anatomical Study ◽  
Venous Drainage ◽  
Rare Occurrence ◽  
Human Skull ◽  
Inner Ear Malformation ◽  
Mandibular Fossa ◽  
Emissary Veins ◽  
Human Skulls ◽  
Temporal Bones

Objective: The aim of the present study was to determine the presence of post-glenoid foramen in human skulls. Methods: The study was carried out in 100 adult dry human skulls with 200 temporal bones on each side (right and left) which were collected from the Department of Anatomy at RVS Dental College and Hospital, Coimbatore. The selected skulls were placed on a flat table and the considerable foramen was visually identified by two investigators. The foramen was examined by a probing method to find out its patency. Results: Of 100 skulls (200 temporal bones), only one skull showed a unilateral post-glenoid foramen on the mandibular fossa of the left side temporal bone (2% of 200). Conclusion: The emissary veins are considered as an important encephalic venous drainage that connects the intracranial and extracranial venous pathway through emissary foramen. If there is little variation, and rare occurrence of the emissary foramen may cause serious pathological condition. Thereby, the present study highlights one of the rare emissary foramen, the post-glenoid foramen. This anatomical study of post-glenoid foramen may help the surgeons while operating temporomandibular joint and inner ear malformation to avoid the risk of accidental bleeding during surgery.

Soft tissue organization in some sertulariid colonial hydroids (Hydrozoa: Sertulariidae)

2008 ◽  
Vol 88 (8) ◽  
pp. 1703-1713 ◽  
Author(s):  
S.V. Pyataeva ◽  
I.A. Kosevich
Keyword(s):  
Soft Tissue ◽  
Soft Tissues ◽  
Structural Complexity ◽  
Anatomical Study ◽  
Soft Body ◽  
Text Book ◽  
Colonial Hydroids ◽  
Tissue Organization ◽  
Epidermal Tissue ◽  
Inner Surface

The simplified text-book view holds that hydroids' soft body is composed of a branched double-layered tube, whose wall consists of two epithelial layers (the inner gastrodermis and the outer epidermis) separated by the mesoglea. Some hydroids are characterized by large, complex colonies and likely an even more complicated inner organization. By using three species from the thecate hydroids of the family Sertulariidae we investigated the soft body structure of such hydroids. The anatomical study revealed some new features of colonial hydroids. The double layered coenosarc fills the perisarc (outer skeleton) tube only at the endings of the branched colony. More proximally, the coenosarc tube becomes narrower and a thin epidermal lining covers the inner surface of the perisarc tube. In some species the soft tissues of the shoots form a network of anastomosing canals. The canals are formed by the gastrodermal epithelium and they are embedded in epidermal tissue. In the upper part of the shoot, these canals are located at the periphery, along the inner surface of the perisarc. In more proximal regions of the stem, the whole lumen of the perisarc tube can be occupied by gastrodermal canals; the canals are enclosed in a parenchyma-like epidermal tissue. The organization of the soft tissue in these thecate hydroids is a striking example of structural complexity that does not contravene the limits of the ground plan of the phylum.

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