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Anatomy > Thoracic Skeleton > Flashcards

Thoracic Skeleton Flashcards

1
Q

3 parts of sternum

A

Manubrium
Body
Xiphoid process

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2
Q

Manubrium: upper + lateral margins

A 
Upper = clavicular + jugular notches
Lat. = attachment site 1st rib + demifacet half 2nd rib
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3
Q

Body of sternum: upper + lateral margins

A 
Upper = sternal angle
Lat. = demifacet + articular facets 3rd-7th ribs
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4
Q

True ribs

A

1-7
Directly, sternum
Vertebrosternal

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5
Q

False ribs

A

8-10
Indirectly, cartilages above
Vertebrochondral

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6
Q

Floating ribs

A

10 + 11

Don’t articulate

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7
Q

Ribs: articulation points

A 
Ant. = sternum
Post. = vertebral column (thoracic)
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8
Q

Typical ribs: numbers + parts

A

3-9

Head, neck, tubercle + shaft

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9
Q

Typical ribs: head

A

Inf. + sup. facet = sep. by crest
Sup. = above
Inf. same number

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10
Q

Typical ribs: neck

A 
Ant. = smooth
Post. = rough
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11
Q

Typical ribs: tubercle

A

Junction head + neck
Medial = round facet - transverse process, same number
Lateral = rough area - costotransverse ligament

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12
Q

Typical ribs: shaft

A 
Ext. = rough  + int. = smooth
Costal groove
Sternal end = indentation
Angle = where curves meet
Axis = bent, vertebral = higher
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13
Q

1st rib

A 
Broadest + shortest
Atypical
Manubrium
Head = round, 1 facet for T1
Shaft = single curve, no angles
Sup. surface:
*groove subclavian a. (post.) + vein (ant.)
*scalene tubercle - ant. scalene
*middle scalene = btw. tubercle + subcalvian a.
*origin serratus ant. 
*subclavius = distal end
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14
Q

2nd rib

A 
Atypical
Sternal angle
SIngle curve, no bends
Head = 2 facets - T1 + T2
Post. scalene = distal to angle (sup.)
Serratus ant. 1st + 2nd digitation = distal to post. scalene
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15
Q

Typical vertebrae: parts

A

Body
Arch
7 processes

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16
Q

Typical vertebrae: body

A

Cylindrical, ant. part

Strength to column + supports weight

17
Q

Typical vertebrae: arch

A

Post. body
2 pedicles + laminae
Pedicles = short processes, post. from body - meet broad plates = laminae
Arch + post. surface of body = walls of foramen
Succession of foramen = vertebral canal
Notches = indentatins in lat. view - with IV discs, form IV foramina

18
Q

Typical vertebrae: processes

A

From arch
1 spinous = post., laminae fuse
2 transverse = lat., laminae + pedicles fuse
2 sup. + 2 inf. = where pedicles + laminae fuse
Sup. - inf. above
Inf. - sup. below

19
Q

Clavicle: location

A

Manubrium to scapula

Subcutaneously

20
Q

Clavicle: medial 2 thirds

A

Convex ant.
Sternal facet
Costoclavicular tuberosity
Subclavian groove

21
Q

Clavicle: lateral third

A 
Concave ant. 
Flattened
Acromial facet
Conoid tubercle
Trapezoid line
22
Q

Clavicle: joints

A

Costoclavicular
Acromioclavicular
Coracoclavicular = coracoid process + conoid tubercle, conoid ligament + trapezoid ligament

23
Q

Thoracic inlet: borders

A 
Lat. = 1st rib
Ant. = manubrium
Post. = T1
24
Q

Thoracic outlet: borders

A 
Lat. = ends of rib 11 + 12
Ant. = costal margin + xiphisternal joint
Post. = T12
25
Q

Joints of thoracic wall

A 
Costovertebral = ribs + vertebrae
Costotransverse = facet of rib + transverse process, synovial
Costochondral = cartilage + ribs
Sternochondral/sternocostal = sternum + cartilage
26
Q

Movement of thoracic wall

A

Bucket handle:

  • lateral/transverse
  • ribs = lower lat.
  • IC m. contract - elevate ribs
  • middle of shaft = lower than 2 ends, when elevated - move laterally

Water pump:

  • antero-posterior
  • ribs = lower ant.
  • IC m. contract - elevate ribs + attached sternum
  • sternum = upwards + forward/downwards + backward
27
Q

Counting ribs

A

1st = masked
Sternal angle
Move fingers + palpate 2nd rib
Count from here

28
Q

Why can’t we palpate 1st, 11th + 12th ribs?

A 
1st = masked by clavicle
Floating = not ant. attached + protected by erector spinae muscles

Anatomy (16 decks)

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