anatomy lab4

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anatomy lab4
2010-09-22 19:34:39

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  1. Projections
    • process
    • condyle
    • epicondyle
    • trochanter
    • tuberosity
    • tubercle
    • crest
    • spine
    • head
  2. process
    extension of a bone away from the bone's surface
  3. condyle
    rounded eminence that articulates with a depression or fossa on another bone
  4. epicondyle
    raised, rounded area located above condyle
  5. trochanter
    very large, roughened, raised area found on the femur
  6. tuberosity
    • similar to a trochanter but smaller
    • roughened, raised area found on the femur
  7. tubercle
    small, rounded eminence
  8. crest
    narrow ridge of bone
  9. spine
    sharp, slender projection
  10. head
    • rounded, enlarged end of a long bone
    • sits atop a narrow portion of the bone called the neck
  11. depressions and opening
    • fossa
    • foramen
    • meatus
    • facet
  12. fossa
    • shallow depression that suaully articulates with a condyle or head of another bone
    • sometimes reffered to as cavities
  13. foramen
    hole for passage of nerves, blood vessels or the spinal cord
  14. meatus
    canal-like passageway
  15. facet
    smooth, flat area
  16. skull
    • cranial bones and facial bones
    • all skull bones except the mandible are joined by immovable interlocking articulations called sutures
  17. sutures
    immovable interlocking articulations that join bones
  18. external view of the cranium
    • frontal bone
    • parietal bone
    • temporal bone
    • external auditory (acoustic) meatus
    • mastoid process
    • styloid process
    • zygomatic process
    • mandibular fossa
    • spehnoid
    • occipital bone
    • foramen magnum
    • occipital condyles
  19. frontal bone
    forms forehead and superior portion of orbit
  20. parietal bone
    forms a large portion of the lateral and superior aspect of the cranium on each side
  21. temporal bone
    inferior to the parietal bone
  22. external auditory (*acoustic) meatus
    external ear passageway leading to the eardrum
  23. mastoid process
    • rounded eminence on the inferior surface, just posterior to the external auditory meatus
    • serves as attachment site for neck muscles
  24. styloid process
    • slender process extending downward from bottom of temporal bone
    • attachment site for throat and neck muscles
  25. zygomatic process
    • slender process extending forward form the temporal bone
    • forms part of the zygomatic arch
  26. mandibular fossa
    • oval shaped depression located just anterior to the external auditory meatus
    • articulates with a condyle on the lower jaw to form the temporomandibular joint
  27. sphenoid
    • connected to frontal bone anteriorly and temporal bone posteriorly
    • forms part of the lateral side of the cranium and part of the posterior surface of orbit
  28. occipital bone
    forms posterior, inferior portion of the cranium
  29. foramen magnum
    • large hole in inferior surface
    • serves as a passageway for the spinal cord as it passes through the cranium to connect to the brain
  30. occipital condyles
    • rounded eminences located on each side of the foramen magnum
    • articulate with fossae on the first cervical vertebra, the atlas
  31. sutures
    • coronal
    • saggital
    • squamosal
    • lambdoidal
    • wormian bones
    • fontanels
  32. coronal
    between frontal bone and each parietal bone
  33. sagittal
    where parietal bones meet at the midline
  34. squamosal suture
    junction between inferior border of the parietal bone and superior border of the sphenoid and temporal bones
  35. labdoidal suture
    joins occipital bone to both parietal bones
  36. womian bones
    • small islets of bone formed within a suture
    • most commonly found within the labdoidal suture
  37. fontanels
    • the fetal skull at birth contains these unossified membranous areas
    • they allow compression of the skull during delivery
  38. floor of cranium
    • ethmoid bone
    • sphenoid bone
    • frontal bone
    • temporal bone
  39. ethmoid bone
    • forms a small portion of the anterior cranial floor, roof of the nasal cavity, upper portion of the nasal septum and part of the medial aspect of the orbit
    • crista galli
    • cribiform plate
  40. crista galli
    • vertical projection
    • serves as point of attachment for the dura matter (outtermost membrane covering the brain)
  41. cribiform plate
    • lateral to the crista galli
    • contains numberous holes for passage of olfactory nerves between the nasal cavity and the brain
  42. sphenoid bone
    • bat-shaped bone.
    • contributes to cranial floor, sides of the cranium and posterior orbit
    • central bone of the cranial floor that connects frontal, ethmoid, temporal and occipital bones
    • sella turcica, optic foramina, lesser wings, greater wings
  43. sella turcica
    small depression in the middle of sphenoid in which pituitary gland resides
  44. optic foramina
    • two small openings at the anterior, lateral edges of the sella turcica
    • serves as passageway for optic nerves
  45. lesser wings
    • arrow, prominent ridge immediately anterior to the sella turcica
    • joins sphenoid bone to frontal and ethmoid bones
  46. greater wings
    • large, posterior portion of the sphenoid bone.
    • joins sphenoid bone to temporal and occipital bones
  47. frontal bone
    forms portion of the cranial floor, anterior to the lesser wings of the sphenoid and lateral to the ethmoid
  48. temporal bone
    • forms portion of the cranial floor lateral to the greater wings of the sphenoid
    • contains channel-like passageway that houses the inner ear (petrous portion)
  49. occipital bone
    • forms posterior portion of the cranial floor
    • contains foramen magnum