What is a lamina Papyracea?
What is a lamina Papyracea?
The lamina papyracea (LP) is the weakest point of the medial wall of the orbit, which forms a connecting line between paranasal sinuses and the orbit. Also, the ethmoidal foramina along the LP are life-saving anatomical landmarks and allow transverse passage of the ethmoidal arteries into ethmoidal cells.
Where is lamina Papyracea found?
the ethmoid bone
The lamina papyracea, also known as the orbital lamina of the ethmoid bone, is the principal component of the medial wall of the orbit, and also the lateral surface of the ethmoid air cells.
What is a Petrous?
Definition of petrous : of, relating to, or constituting the exceptionally hard and dense portion of the human temporal bone that contains the internal auditory organs.
What is the densest bone in the human body?
human petrous bone
The human petrous bone in the skull protects the inner ear structures. Though it is one of the hardest, densest bones in the body, some portions (such as the area in orange, protecting the cochlea) are denser than others.
Can an orbital fracture heal on its own?
Some orbital wall fractures heal on their own, while others require surgery. Your doctor will discuss which treatment is right for you. Two types of surgery are used for orbital wall fractures: Traditional surgery, which requires an open incision.
What is right lamina papyracea fracture?
Blow-out fractures occur when a blow to the eye increases pressure in the orbit, causing the weak floor or medial wall (lamina papyracea) to “blow out” into the maxillary sinus or ethmoid bone. [3, 4, 5, 6, 7, 8, 9] This results in a fracture, though it often prevents globe rupture and loss of the eye.
Is lamina papyracea part of orbital floor?
The weakest portion of the orbit is the thin orbital floor (maxilla) and the lamina papyracea (ethmoid bone) medially and inferiorly.
Where is the cribriform plate?
ethmoid bone
The cribriform plate is a portion of the ethmoid bone located at the base of the skull. The base of the skull is the term used to describe the most inferior portion of the skull. It is comprised of portions of the frontal bone, ethmoid bone, sphenoid bone, temporal bone, and occipital bone.
Why is the petrous portion so dense?
Petrous comes from the Latin word petrosus, meaning “stone-like, hard”. It is one of the densest bones in the body. The petrous bone is important for studies of ancient DNA from skeletal remains, as it tends to contain extremely well-preserved DNA….
| Petrous part of the temporal bone | |
|---|---|
| FMA | 52871 |
| Anatomical terms of bone |
Which is the hardest bone?
The “femur” is the hardest bone in the human body. Location: It extends from the hip to the knee.
What is the difference between petrosquamous and squamotympanic?
Inferior view. The petrosquamous suture is the interosseous border the petrous part and the squamous part of the temporal bone. The petrotympanic suture (also known as the squamotympanic suture) is a temporal fissure that runs between the temporomandibular joint (TMJ) and the tympanic cavity.
What is the petrosquamous suture and what does it do?
The petrosquamous suture is a cranial suture between the petrous portion and the squama of the temporal bone. It forms the Koerner’s septum. The petrous portion forms the medial component of the osseous margin, while the squama forms the lateral component. The anterolateral portion…
What is the difference between petrous and petromastoid?
The petrous portion forms the medial component of the osseous margin, while the squama forms the lateral component. The anterolateral portion (squama) arises from the mesenchyme at 8 weeks of embryogenesis while the petromastoid portion develops later from a cartilaginous center at 6 months of fetal development.
What is the difference between the petrosquamous and spheno-occipital suture?
The petro-occipital suture is the junction between the occipital bone and the petrous part of the temporal bone. The spheno-occipital suture articulates the sphenoid bone and the occipital bone. The petrosquamous suture is the interosseous border the petrous part and the squamous part of the temporal bone.
