quiz 2 Flashcards
(24 cards)
Suture where parietal and occipital bone meet.
- Lambdoidal Suture
The only freely movable joint in the head.
- Temporomandibular joint
Facial bones that help to form the orbits.
- Ethmoid Bones
Known as the radiographic baseline.
Orbitomeatal line
What part of the bone is demonstrated in PA
Frontal bones
Most important landmark in skull radiography.
-Nasion
What is the entrance of central ray in lateral projection of the cranium?
- 2 Inches above the external auditory meatus
What central ray is utilized in AP axial projection of cranium
15 degrees cephalad
Who recommended that Towne method requires a strong depression of the chin and direction of the central through the foramen
Altschul
What is the degree difference between the OML and IOML when performing AP axial Towne method for the cranium?
7 degrees
What central ray is utilized in AP axial Towne method to demonstrate the entire foramen magnum?
40-60 degrees
It is known as the Reid’s base line.
Infraorbitomeatal line
What line should be parallel to the IR when performing submento-vertical projection?
Infraorbitomeatal line
What structure is demonstrated in PA
projection of the cranium if the central ray is angled 20-25 degrees caudal?
- Petrous pyramid projected over ⅓ of inferior orbits
What central ray is utilized in AP axial Towne method if the OML is perpendicular
30 degrees
What line is perpendicular in lateral projection of the cranium?
- Interpupillary line
The normal or average type of the skull.
-Mesophalic
Protrusion at the back of the skull.
- External Occipital Protuberance
It connects the bilateral superior border of the orbit
Sub-nasal point which is the reference point for waters projection.
- Nasion
The upper jaw bone.
- Maxilla
Known as the soft spots on the baby’s head.
- Fontanelles
It makes up the protective frame of bone around the brain.
- Cranial Bone
What method is utilized in PA projection of the cranium if the central ray is 15 degrees caudal?
- PA Caldwell Method
What structure fills the orbit in PA projection of the cranium utilizing 0 degrees or perpendicular central ray?
- Petrous Pyramids or Petrous ridge
