head.txt

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Author:
dodgybarnet
ID:
127659
Filename:
head.txt
Updated:
2012-01-13 16:46:32
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EMT book1
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Head
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  1. ´╗┐Galea aponeurotica
    Tough layer of dense fibrous tissue, directly beneath the scalp, on the superior aspect of the cranium
  2. SCALP layers of the skin:
    • S: Skin
    • C: Connective tissue - A thin layer of fat and fibrous tissue lies beneath the skin.
    • A: Aponeurotica (Galea aponeurotica)
    • L: Layer of subaponeurotica (areolar) tissue - contains emissary veins transferring blood from dural sinuses to venous vessels of the scalp.
    • P: Periosteum of the skull (the pericranium)
  3. Skull bone - Frontal
    Forehead
  4. Skull bone - Sphenoid
    Between Zygomatic and Temporal
  5. Skull bone - Ethmoid
    Behind eye
  6. Skull bone - Lacrimal
    Side of nose by tear duct
  7. Skull bone - Maxilla
    Upper jaw
  8. Skull bone - Mandible
    lower jaw
  9. Skull bone - Zygomatic
    cheek bone
  10. Skull bone - Parietal
    top of head
  11. Skull bone - Temporal
    ear
  12. Skull bone - Occipital
    back of head
  13. Skull bone - Nasal
    nasal
  14. Frontal lobe does?
    Personality
  15. Parietal lobes does?
    • Motor & sensory control
    • Emotions
  16. Occipital lobe does?
    Sight
  17. Temporal lobes does?
    • Long term memory
    • 4 senses: Hearing, Speech, Taste, Smell.
  18. Falx cerebri
    A dural partition between hemispheres
  19. Tentorium cerebelli
    Extension of the dura mater that separates the cerebellum from the inferior portion of the occipital lobes.
  20. Central sulcus
    Separates the parietal lobe from the frontal lobe
  21. Brain, 2 parts?
    • Forebrain
    • Hindbrain
  22. Forebrain, 2 parts?
    • Cerebrum
    • Diencephalon
  23. Hindbrain, 2 parts?
    • Cerebellum
    • Brainstem
  24. Brainstem, 3 parts?
    • Midbrain
    • Pons
    • Medulla oblongata
  25. Cerebellum location and does?
    • Hindbrain
    • Fine motor control
    • Balance
    • Muscle tone
  26. Midbrain location and does?
    • Hindbrain>Brainstem
    • Upper portion of the brainstem that connects the pons and cerebellum with the central hemispheres.
    • Controls eye movement
  27. Pons location and does?
    • Hindbrain>Brainstem
    • Communication interchange between CNS components; cerebellum, cerebrum, midbrain and spinal cord
    • Responsible for sleep components of the Reticular Activating System (RAS)
  28. Medulla oblongata location and does?
    • Hindbrain>Brainstem
    • Contains the Cardiac centre, Respiratory centre, Vasomotor centers.
    • Deals with autonomic, involuntary functions, such as breathing, heart rate and blood pressure.
  29. Diencephalon - 3 parts
    • Thalamus
    • Hypothalamus
    • Limbic system
  30. Thalamus location and does?
    • Diencephalon
    • Switching center between pons and cerebrum
    • Controls the Reticular Activating System (RAS): Establishes consciousness & Sleep-wake cycle
  31. Hypothalamus location and does?
    • Diencephalon
    • Endocrine function
    • Hunger, Thirst, Vomiting, Kidney function
    • Body temp regulation
  32. Limbic system location and does?
    • Diencephalon
    • a set of brain structures including the hippocampus, amygdala, and some other weird shit
  33. External carotid arteries
    supply the face and scalp with blood.
  34. Internal carotid arteries
    supply blood to the anterior 3/5 of cerebrum
  35. Vertebral arteries
    • Pass through the vertebrae, and supply the posterior 2/5 of the cerebrum, part of the cerebellum, and the brain stem.
    • They join in the base of the skull to form one vessel, the Basilar artery
  36. Carotid sinus
    Where common carotid divides into the internal and external carotid arteries
  37. Circle of Willis
    The internal carotid and basilar arteries join at the base of the brain, forming a circle of communicating arteries, so if any one vessel is blocked, blood supply will be uninterrupted.
  38. Cerebral Perfusion Pressure (CPP)
    • Pressure moving blood through the cranium
    • CPP = MAP - ICP
    • Mean Arterial Pressure (MAP)
    • What this means is that, if there is any increase in ICP (be it edema, or space being taken up by a tumor) then the bodies response to maintain CPP is to increase BP.
    • ↑ BP will ↑ MAP to compensate for ↑ ICP, thus maintaining CPP
    • But, ↑ BP will ↑ ICP. This leads to a feedback loop which'll end in death

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