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General Anatomy Sem1 > Ch 3-Thorax: Wall > Flashcards

Ch 3-Thorax: Wall Flashcards

1
Q

Superior Thoracic aperture borders:

A
  • vertebra TI
  • rib I
  • manubrium of sternum
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2
Q

Inferior Thoracic aperture borders

A
  • vertebra TXII
  • rib XII
  • rib XI
  • costal margin
  • xiphoid process
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3
Q

Articulation with ribs by:

A
  • 2 demifacets,
    - superior costal facet-head of own rib
    - inferior costal facet-head of rib below
  • Transverse costal facet-turbercle of own rib
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4
Q

Special articulations of:

  • TI
  • TX
  • TXI and TXII
A
  • head of rib 1 wi/ superior costal facets.
  • only with own rib X, no inferior costal facets.
  • only with own ribs, lack transverse costal facet
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5
Q
  • True ribs:
  • False ribs:
  • Floating ribs
A
  • 1-7
  • 8-12:
  • 11 and 12
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6
Q

At Head of rib:

  • superior costal facet with
  • inferior costal facet with
  • internal surface of anterior part of ribs faces somewhat superiorly relative to posterior part
A
  • inferior costal facet above

- superior costal facet below

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7
Q

Rib 1

A
  • slopes inferiorly to manubrium
  • connects to TI by only one articular surface
  • scalene tubercle distinct
  • Anterior groove-subclavian vein
  • Posterior groove-subclavian artery
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8
Q

Rib II

A
  • like rib 1

- twice as long

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9
Q

Rib X

A

-has single articulation with its own vertebra

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10
Q

Ribs XI and XII

floating ribs!

A
  • only with theire own vertebrae
  • have no tubercles or necks
  • short, little curve
  • pointed anteriorly
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11
Q

Manubrium of sternum

A
  • has jugular notch
  • site for clavicle
  • lateral sites for rib 1
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12
Q

Body of sternum

A
  • superiorly theirs facet for rib 2

- lateral facets for ribs III to VI

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13
Q

xiphoid process

A

-articulation with 7th costal cartilage

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14
Q

Costotransverse joints

A
  • synovial joints between tubercle of ribs and transverse process of related vertebra
  • costotransverse ligament-attaches neck of rib to transverse process
  • lateral costotransverse ligament-attaches tips of transverse process to nonarticular part of tubercle
  • superior costotransverse ligament-attaches superior surface of neck to transverse process of vertebra above.
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15
Q
  • Sternocostal joints
  • rib 1
  • rib II-VII
  • @ rib II
A
  • consists of fibrocartilaginous connection
  • synovial joints
  • at synovial joint, divided into 2 compartments by a intraarticular ligament
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16
Q
  • Interchondral joints

- at Ribs V,VI to VII-X

A
  • between costal cartilages of adjacent ribs
  • synovial, reinforced by interchondral ligaments
  • indirect anchorage to the sternum
17
Q

Manubriosternal and xiphisternal joints

A
  • joints between manubrium and body of sternum
  • between body of sternum and xiphoid process
  • called symphyses.
  • slight angular movements occur between manubrium and body of sternum during respiration.
  • forming sternal angle for palpitation of rib II
18
Q

-sternal angle

A
  • lies on horizontal plane that passes through intervertebral disc between TIV and TV
  • separates superior mediastinum from inferior mediastinum
  • marks superior border of pericardium
19
Q

Muscles of pectoral region originate from anterior thoracic wall and insert into bones of upper limb

A
  • Pectoralis major
  • pectoralis minor
  • subclavius muscle
20
Q

Pectoralis major:

  • origin
  • insertion
  • function
A
  • medial half of clavicle, sternum, first 7 costal cartilage
  • proximal humerus
  • adduction, rotation, flexion of humerus
21
Q

subclavius

A
  • small, underneath pect major
  • passes laterally from anterior medial rib I to inferior clavicle
  • pulls tip of shoulder inferiorly
22
Q

pectoralis minor

-clavipectoral fascia

A
  • passes from ant surfaces of rib III to V to coracoid process of scapula
  • pulls tip of shoulder inferiorly
  • encloses subclavius and pec minor and attaches to clavicle above and floor of axilla below
    • structures pass through all this
23
Q

Cervical ribs:

-thoracic outlet syndrome

A
  • rare, articulates w/ CVII, with the ant end attached to superior border of ant aspect of rib I
  • structures that normally pass over rib I are elevated by and pass over, cervical rib and band
  • abnormal compression of brachial plexus of nerves as it passes over the first rib and through axillary inlet into upper limb

General Anatomy Sem1 (12 decks)

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