General anatomy Flashcards

1
Q

What are the functional divisions of the cerebellum?

A

Vestibulocerebellum
Spinocerebellum
Pontocerebellum

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2
Q

What does the vetibulocerebellum do?

A

Balance, spatial orientation and muscular tone

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3
Q

What does the Spinocerebellum do?

A

Sensing proprioceptive input

Adapting the body to changing circumstances

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4
Q

What does the Pontocerebellum do?

A

Regulate small limb movements, inhibits involuntary movements

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5
Q

What is dura matter?

A

Stong, thick dense membrane

supports and surrounds dura sinuses

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6
Q

What is arachnoid matter?

A

Middle layer

Surrounds spinal cord and brain

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7
Q

What is pia matter?

A

Innermost layer

Thin fibrous tissue, covering outside by flat cells

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8
Q

What is extradural space?

A

Potential space inside the cranial vault

Only noticable if underlying pathology

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9
Q

What is subdural space?

A

Space that can opened by separation of arachnoid mater from dura matter
Result from trauma
Pathologic absence of CSF

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10
Q

Sulcus

A

Grooves in cortex

TWO S’s

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11
Q

Fissure

A

Large furrow that divides the brain lobes

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12
Q

Gyrus

A

Ridge of cerebral cortex

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13
Q

Insula

A

Small region of cerebral cortex located deep within lateral sulcus

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14
Q

Longitudinal fissure

A

Deep groove that separates the left and right hemisphere

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15
Q

Lateral fissure

A

Divide both the frontal and parietal lobe from temporal lobe

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16
Q

Corpus collosum

A

Nerve fibre bundle between left and right hemispheres- beneath cerebral cortex

17
Q

Folia of cerebellum

A

Little folds or gyri- sectioned either parallel to their long axis or transverse

18
Q

Vermis of cerebellum

A

Located medial, corticonucelar zone

19
Q

Lobes of the cerebellum

A

Anterior- Closer to the cerebrum, smaller lobe
Posterior- More posterior
Flocculomondular- comes off posterior towards the brainstem

20
Q

Production and reabsorption of CSF

A

Produced in choroid plexus, located in lining of ventricles
Capillaries and connective tissue surround
Plasma filtered out by blood by epithelial cells to produce CSF

21
Q

Functions of the CSF

A
  1. protection- act as cushion
  2. Buyoncy- immersed in CSF the net weight of brain is reduced approx 25 grams
  3. Chemical stability- CSF creates an environment to allow it
22
Q

What are the 3 different ventricles

A

lateral ventricle
Third ventricle
Fourth ventricle

23
Q

Drainage of CSF

A

Subarachnoid cisteras

24
Q

What are the 2 protrusions of the 3rd ventricle

A

Supra-optic recess- optic chiasm

Infundibular recess- optic stalk

25
Q

How does 4th ventricle receive CSF?

A

Cerebral aquaduct

26
Q

4th ventricle drains to:

A
  1. cerebral spinal cord

2. subarachnoid cisteras

27
Q

2 classifications of hydrocephalus

A
  1. Communicating (non abstructive)- functional impairment of arachnoid granulations- following haemorrhage
  2. Non-communicating (obstructive)- Flow obstructed within the ventricle
    Blockage in the cerebral aquaduct
28
Q

Bones of neurocranium

A
  1. Occipital
  2. temporal
  3. frontal
  4. parietal
  5. sphenoid
  6. ethmoid

*8 all together- temporal and parietal each have 2

29
Q

Bones of viscercranium

A
  1. mandibular
  2. zygotmatic
  3. maxilla
  4. nasal
  5. lacriminal
  6. palatine
  7. inferior nasal concha
  8. vomer
30
Q

Main sutures

A

Coronal- fuses frontal bone with 2 parietal bones
Sagittal- fuses parietal bones with each other
Lambdoid- fuses the occipital bone with 2 parietal bones

31
Q

2 main fontanelles

A
Frontal= between coronal and sagittal 
occipital= between sagittal and lambdoid
32
Q

Laterality

A

Ipsilateral- same side

Contralateral- Opposite side

33
Q

Male and female skull comparison

A

Male

  • Cranial mass more bulky
  • Zygomatic bone more prominent
  • mandible more squared
  • deeper cranial mass
  • Supercillary arch is males is large and pronounced
  • External occipital protuberance larger

Female

  • Suproorbital margin is sharper
  • More pointed chin
34
Q

What are the 4 pairs of parasinal air sinuses

A
  1. maxillary- cheeks
  2. ethmoid- nose
  3. sphenoid- by ears
  4. frontal- forehead
35
Q

What is the most delicate part of the skull?

A

Pterion- where frontal bone , sphenoid greater wing, temporal and perietal articulate