General anatomy Flashcards Preview

Anatomy terms > General anatomy > Flashcards

Flashcards in General anatomy Deck (35)
Loading flashcards...
1

What are the functional divisions of the cerebellum?

Vestibulocerebellum
Spinocerebellum
Pontocerebellum

2

What does the vetibulocerebellum do?

Balance, spatial orientation and muscular tone

3

What does the Spinocerebellum do?

Sensing proprioceptive input
Adapting the body to changing circumstances

4

What does the Pontocerebellum do?

Regulate small limb movements, inhibits involuntary movements

5

What is dura matter?

Stong, thick dense membrane
supports and surrounds dura sinuses

6

What is arachnoid matter?

Middle layer
Surrounds spinal cord and brain

7

What is pia matter?

Innermost layer
Thin fibrous tissue, covering outside by flat cells

8

What is extradural space?

Potential space inside the cranial vault
Only noticable if underlying pathology

9

What is subdural space?

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

10

Sulcus

Grooves in cortex
TWO S's

11

Fissure

Large furrow that divides the brain lobes

12

Gyrus

Ridge of cerebral cortex

13

Insula

Small region of cerebral cortex located deep within lateral sulcus

14

Longitudinal fissure

Deep groove that separates the left and right hemisphere

15

Lateral fissure

Divide both the frontal and parietal lobe from temporal lobe

16

Corpus collosum

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

17

Folia of cerebellum

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

18

Vermis of cerebellum

Located medial, corticonucelar zone

19

Lobes of the cerebellum

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

20

Production and reabsorption of CSF

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

Functions of the CSF

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

What are the 3 different ventricles

lateral ventricle
Third ventricle
Fourth ventricle

23

Drainage of CSF

Subarachnoid cisteras

24

What are the 2 protrusions of the 3rd ventricle

Supra-optic recess- optic chiasm
Infundibular recess- optic stalk

25

How does 4th ventricle receive CSF?

Cerebral aquaduct

26

4th ventricle drains to:

1. cerebral spinal cord
2. subarachnoid cisteras

27

2 classifications of hydrocephalus

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

Bones of neurocranium

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

*8 all together- temporal and parietal each have 2

29

Bones of viscercranium

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

30

Main sutures

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