Osteology Flashcards
What is a depressed fracture?
One at which it creates an indent
Fragment of bone compresses underlying structures
What are the symptoms of skull fractures?
Bleeding from wound, ears, nose and eyes Bruising Draining of CSF Swelling Confusion Convulsions Loss of consciousness
What is a linear calvarial fracture?
This is where the fracture radiates causing fracture lines away from the point of impact
What is a comminuted fracture?
Bone broken into several pieces
What is a countercoup fracture?
This is where no fracture occurs at point of impact but one occurs on opposite side of cranium
What is a simple fracture?
This is where no damage of skin occurs
What is a compound fracture?
Involves a break in the skin and splintering of bone along with brain injury
What is a basal skull fracture?
Presents with battle sign
What is the pterion?
H shaped, weakest part of the skull on lateral side Temporal Frontal Parietal Sphenoidal Thinnest part of calvaria
What can a fracture of pterion cause?
Extra dural haemorrhage due to rupture of middle menangial artery
By what route does an infection spread from scalp to skull bones and what infection does it cause?
Emissary veins and venous sinuses
Osteomyelitis
What are the foramen of the calvaria?
Spinosum Magnum Ovale Lacerum Carotid canal Jugular foramen
What is malar flush an indication of?
Mitral stenosis
How does a fracture of the dens occur?
Fall on head
May injure spinal cord -> quadriplegia
May injure brain stem -> death
How does hyper flexion of cervical region occur?
Head on collisions
Causes rupture of lower intervertebral discs resulting in compression of spinal nerve roots C6 and C7
Pain in neck, shoulder, arm and hand