Ch 3-Thorax: Wall Flashcards
1
Q
Superior Thoracic aperture borders:
A
- vertebra TI
- rib I
- manubrium of sternum
2
Q
Inferior Thoracic aperture borders
A
- vertebra TXII
- rib XII
- rib XI
- costal margin
- xiphoid process
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
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
5
Q
- True ribs:
- False ribs:
- Floating ribs
A
- 1-7
- 8-12:
- 11 and 12
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
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
8
Q
Rib II
A
- like rib 1
- twice as long
9
Q
Rib X
A
-has single articulation with its own vertebra
10
Q
Ribs XI and XII
floating ribs!
A
- only with theire own vertebrae
- have no tubercles or necks
- short, little curve
- pointed anteriorly
11
Q
Manubrium of sternum
A
- has jugular notch
- site for clavicle
- lateral sites for rib 1
12
Q
Body of sternum
A
- superiorly theirs facet for rib 2
- lateral facets for ribs III to VI
13
Q
xiphoid process
A
-articulation with 7th costal cartilage
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.
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
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
