Cranium Blue Boxes Flashcards

1
Q

Examples of complications of head injuries?

A

Hemorrhage, infection, and injury to the brain.

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2
Q

Most common symptom of head injury?

A

Disturbance in level of consciousness

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3
Q

How common are head injury deaths?

A

Almost 10% of all deaths in the US, with approximately half of all traumatic injury deaths involving the brain

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4
Q

What group is most prone to have head injuries?

A

Ages 15-24 (probs car accidents)

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5
Q

Headaches and facial pain probably mean…

Despite this, they could also indicate….

A

tension, fatigue, mild fever.

tumor, subarachnoid hemorrhage, meningitis

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6
Q

Describe neuralgias

A

Severe throbbing or stabbing pain in the course of a nerve caused by a demyelinating lesion. Ex. Facial Neuralgias.

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7
Q

Give examples of localized head pains.

A

Otalgia and Odontalgia

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8
Q

Why are the superciliary arches prone to cause injury?

A

The ridges are sharp and when they take a blow, skin laceration/bleeding is common.

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9
Q

What physical manifestation would you expect to see if a patient has bleeding around the superciliary arches.

A

Bruising/Bleeding of the tissue surrounding the orbit causes a buildup in the connective tissues around the eye, causing a black eye.

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10
Q

Alternate name for the zygomatic bone?

A

Malar Bone

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11
Q

What is malar flush?

A

Redness of the skin covering the zygomatic process associated with a rise in temperature in various fevers (ex. tuberculosis, systemic lupus erythematosus)

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12
Q

Le Fort classified what?

A

Types of Maxillary fractures.

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13
Q

A broken mandible will typically involve how many fractures?

A

Two on opposite sides of the mandible

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14
Q

Where is the opposite break of the mandible often found?

A

The neck/body of the mandible in the canine tooth region.

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15
Q

What type of mandible fracture it often a single break?

A

Factures of the coronoid process.

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16
Q

Fractures of the neck of the mandible are often associated with…

A

TMJ dislocation

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17
Q

A fracture of the angle of the mandible will probably involve the

A

bony socket of the 3rd molar

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18
Q

Fractures of the body of the mandible typically pass through….

A

the socket of a canine tooth

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19
Q

Cause of alveolar bone reabsorption?

A

Tooth Extraction

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20
Q

Describe the process following complete loss of teeth.

A

Tooth socket fill with bone, alveolar processes begin to resorb.

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21
Q

How can alveolar reabsorption cause mandibular problems?

A

Gradually, the mental foramen will be closer and closer the superior border of the mandible. This can cause the foramen to disappear and expose the nerves to injury. Pressure from a prosthesis can make this worse.

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22
Q

How does a loss of teeth influence facial shape?

A

Deep creases in the skin around the mouth, decreased vertical facial dimension, and mandibular overclosure (prognathism)

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23
Q

Hard blows to thin areas of the calveria are likely to form what?

A

Depressed Fractures – bone frag is depressed inward, compressing/injuring the brain.

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24
Q

What are linear calvarial fractures?

A

Most frequent type. Occur at point of impact, but with fracture lines radiating away in several directions.

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25
What are comminuted fractures?
The bone is broken into several pieces .
26
What is a contrecoup fracture?
A fracture in which no fracture occurs at the point of impact, but one occurs on the opposite side of the cranium.
27
How do surgeons access the brain?
Craniotomy -- a surgery in which a section of the neurocranium (bone flap) is elevated or removed
28
How do surgeons get around the adult skull's poor osteogenic qualities?
Reflecting the bone with its overlying muscle, skin, and blood supply.
29
If in a craniotomy, the piece of skull isn't returned, what is the procedure called? What do you put there instead?
Craniectomy. A permanent plastic or metal plate.
30
How do the bones of the calveria/ some pieces of the cranial base develop?
Intramembranous ossification.
31
How does most of the cranial base develop?
Endochondral ossification?
32
Differences in a baby's skull structure?
No diploe. Prominent frontal and parietal eminences. Disproportionately large cranium, but not face.
33
Compare the amount of skull that is face in a newborn and an adult.
1/8 in newborn, 1/3 in adult.
34
What causes the large size of infant calveria?
Precocious growth and development of the brain and eyes.
35
What separates the halves of the frontal bone in neonates?
Frontal suture.
36
What separates the frontal and parietal bones?
Coronal suture
37
What separates the maxillae and mandibles?
Intermaxillary suture and mandibular symphysis (2ndary cartilaginous joint)
38
Consequence of no mastoid/styloid at birth?
Facial nerves run very close to the surface, opening them to injury from forceps in delivery.
39
When does the mastoid process develop?
The first year as the SCM develops and pull on the temporal bones.
40
Who are the main fontanelles?
Anterior, posterior, paired sphenoidal, and mastoid fontanelles.
41
Palpation of fontanelles shows...
Progress of bone groth, hydration, intercranial pressure
42
Describe the anterior fontanelle.
Largest, diamond shaped, btw frontal and parietal bones. It is the future site of bregma. Disappears by 18 months.
43
Another name for remnant of the frontal suture is...? Why should we care?
Metopic suture. Persistent sutures can be misinterpreted as a fracture.
44
Describe the posterior fontanelle.
Triangular. btw the parietal and occipital bones. future site of lambda. Not palpable after year 1.
45
Describe the sphenoidal and mastoid fontanelles.
Overlain by temporalis muscle, less clinically important.
46
How old is a kid when the two halves of the mandible fuse?
2
47
Perks of the whole fonantelle situation?
Helps the head fit through during delivery.
48
After birth the baby will look like....this will last for...
A conehead. A few days.
49
About how old are you when the skull stops growing?
20 (16 real growth and about 4 of thickening)
50
Name the cartilaginous component that holds the halves of the mandible together for the first two years.
Mandibular Symphysis
51
A neonate's mandible has how many teeth per side?
5
52
How old when teething begins?
Approx 6 months
53
Rapid facial growth in infancy and early childhood correlates with...
eruption of deciduous teeth
54
Dentaoalveolar development will cause...
lengthening of the face
55
Concurrent size increases in the frontal and facial regions is associated with...
Increased paranasal sinus sizes.
56
Describe paranasal sinuses in adults? Neonates?
Air filled extensions of the nasal cavities in certain cranial bones. Most are rudimentary/absent at birth.
57
Growth of the paranasal sinuses will...
alter face shape and add vocal resonance
58
At what age do cranial sutures start to go away?
30-40 for internal. 40-50 for external.
59
Where does cranial suture obliteration begin?
Bregma
60
How do cranial bones change with age?
They become thinner and lighter as the diploe become filled with a gray gelatinous material made of fat.
61
What is primary craniosynostosis?
Premature closure of cranial sutures resulting in several cranial malformations.
62
Cause of craniosynostosis? Frequency?
Unknown, but somehow probably tied into genetic factors. 1:2000 births.
63
What is the predominant theory for how craniosynostosis happens?
Abnormal cranial base development causes exagerrated forces on the dura mater. This will disrupt normal cranial suture development.
64
Which sex is more prone to develop craniosynostosis?
Male
65
A prematurely closed sagittal suture will cause...
Scaphocephaly -- Small/Absent Anterior Fontanelle. Long/Narrow wedge shaped cranium.
66
A prematurely closed coronal/lambdoid suture on one side will cause...
Plagiocephaly -- Twisted and asymmetrical cranium
67
A prematurely closed coronal suture will cause...
Oxycephaly/Turricephaly -- A high, tower-like cranium
68
How does premature closure of sutures alter brain development?
It typically doesn't.