Lab 2 - Human brain Flashcards Preview

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Flashcards in Lab 2 - Human brain Deck (45)
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1

corpus callosum

white matter.
Commissural fibres which link the L and R hemispheres

2

the _______ is grey matter thrown into ridges: _______ and folds: _______

the _cortex_ is grey matter thrown into ridges: _gyri_ and folds: _sulci_

3

location of the primary visual cortex

in the occipital lobe, centered over the calcarine sulcus

4

location of the basal ganglia. Which parts are visible?

the basal ganglia are deeply buried in each hemisphere. The head of the caudate nucleus will likely be visible as a bulge on the wall of the lateral ventricle

5

Thalamus structure, function and location

- two lobes connected by the intermediate mass
- relays almost all of sensory input to the cortex
- large structure under the lateral ventricle and surrounded by the 3rd ventricle around the intermediate mass

6

hypothalamus structure, function and location

- small "triangular" shaped
- controls internal body functions, and the autonomic nervous system
- superior to the pituitary and inferior to the thalamus and 3rd ventricle

7

pituitary gland

a gland attached to the hypothalamus and controlled by it, but always torn off when the brain is removed from the skull because it is embedded into the skull

8

4 things that make up the diencephalon of the forebrain

1. thalamus
2. hypothalamus
3. pituitary gland
4. third ventricle
5. internal capsule

9

lateral ventricle

contains choroid plexus for CSF production

10

if a groove is deep it is called

fissure

11

mamillary body

reflexes to smell

12

midbrain constitutes...

1. superior and inferior colliculi
2. cerebral aqueduct
3. cerebral peduncles
4. substantia nigra

13

superior and inferior colliculi

superior colliculus = reflexes to sight
inferior colliculus = reflexes to sound

14

cerebral aqueduct

links the 3rd and the 4th ventricles.
matchstick size.

15

cerebral peduncles is a ______ _______ ______ which makes up the floor of the _______. They carry information between the _______ and the spinal cord (__________ fibres) and between the ________ and the pons (___________ fibres).

cerebral peduncles is a _white_ _matter_ _tract_ which makes up the floor of the _midbrain_. They carry information between the _cortex_ and the spinal cord (_corticospinal_ fibres) and between the _cortex_ and the pons (_corticopontine_ fibres).

16

Hindbrain structures include...

1. pons
2. medulla
3. cerebellum
4. 4th ventricle

17

pons

carries corticospinal fibres and nuclei of cranial nerves

18

medulla

carries corticospinal fibres e.g. the pyramids, cranial nerve nuclei, and grey matter (which controls breathing and heart).

19

cerebellum

fine motor control , balance
IPSILATERAL control

20

brainstem =

midbrain + hindbrain - cerebellum

21

how to identify the central sulcus

follow back the three gyri of the frontal lobe (superior frontal, middle frontal, inferior frontal) until they crossed by a major gyrus running transversely across the hemisphere = precentral gyrus.

22

most superior lobe of the brain

parietal

23

which lobe is defined by the central sulcus and the lateral fissure

frontal

24

lobe inferior to the lateral fissure

temporal

25

most posterior lobe of the brain

occipital

26

pre-central gyrus

primary motor cortex

27

post-central gyrus

primary somatosensory cortex

28

exner's area

- coordinates/controls hand movements for writing
- middle frontal gyrus
- anterior to the pre-central gyrus

29

Broca's speech area

- coordinates/controls larynx and tongue for speech
- inferior frontal gyrus
- anterior to the pre-central gyrus

30

Wernicke's speech area

- main processing centre for spoken language
- sounds become speech with meaning
- posterior to the PAC below the lateral fissure