Parts of the skull

Question 1

meninges

Answer 1

• the three membranes enclosing the CNS
• dura mater (hardest and closest to the skull)
• arachnoid mater (spiderweb)
• pia mater (soft squishy)

Question 2

Cerebrospinal Fluid

Answer 2

• cushions the brain and spinal cord
• makes the tissues effective mass lower (like they’re floating)
• lumbar puncher (ouch) to extract some (don’t take too much)

Question 3

Cranial fossa

Answer 3

• the inside of the skill (isnt smooth)
• Anterior cranial fossa (Front of the head)
• posterior cranial fossa (back bottom of the head)
  middle cranial fossa (between the two)
• its the floor of the cranial cavity and it is not smooth

Question 4

meningeal blood supply

Answer 4

• anterior meningeal artery ( irrigates the meninges in the anterior cranial fossa
• middle meningeal artery (irrigates the meninges in the middle cranial fossa)
• posterior meningeal artery ( irrigates the meninges in the posterior cranial fossa)

Question 5

blood supply of the brain

Answer 5

• left and right internal carotid arteries ascend in the neck to enter the skull through the carotid canal
• left and right vertebral arteries ascend in the neck to ender the skull through the foramen magnum to supply blood to the brain parenchyma

Question 6

circle of willis

Answer 6

• bypasses blood flow int eh event of a blockage (stroke)
• evolutionary adaptation
• the joining area of several arteries at he bottom side of the brain
• located at the base of the brain

Question 7

meningeal hematomas

Answer 7

• subdural hematomas - caused by bleeding of bridging veins across the subdural space. blood collects between the dura mater and the arachnoid space resulting in increased intracranial pressure
• epidural hematoma - caused by bleeding of meningeal arteries resulting in blood pooling between the dura mater and the skull

Question 8

Pterion

Answer 8

• weakest parts of the skull
• region of the lateral skull - at the junction of 4 skull bones
• a part of the meningeal artery runs under the pterion
• rapid accelerations/deceleration caused by traumatic blow can rupture the MMA causing an epidural hematoma

Question 9

parietal bone

Answer 9

• back largest plate of the skull

Question 10

frontal bone

Answer 10

• forehead and top of the head

Question 11

nasal bone

Answer 11

• your nose

Question 12

temporal bone

Answer 12

where you ear would be

Question 13

occipital bone

Answer 13

• back base of the head

Question 14

mandible

Answer 14

• lower jaw

Question 15

zygomatic bone

Answer 15

• side and under the eye