Thorax Flashcards

1
Q

where is the thorax?

A

between the neck and abdomen

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2
Q

what is the chest?

A

superior part of the trunk, housing the pectoral girdle

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3
Q

what does the thoracic cavity hold? which systems does it include?

A

lungs and heart. respiratory and cardiovascular systems.

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4
Q

what is the thoracic cage?

A

rib cage

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5
Q

how is the thoracic cavity divided?

A

mediastinum (housing thoracic viscera), right and left pulmonary cavities which houses the lungs

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6
Q

what are the functions of the thoracic cage?

A

rigid but flexible, protect organs, resist internal pressure, attachment for and support upper limbs, anchoring origins of many muscles.

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7
Q

what does the thoracic skeleton consist of and what does it do?

A

12 pairs of ribs & cartilage, 12 thoracic vertebrae and IV discs, sternum, ribs, costal cartilage, thoracic vertebrae. It protects the thoracic viscera and abdominal organs

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8
Q

what are true ribs?

A

ribs 1-7 that directly attach to sternum through their own costal cartilages

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9
Q

what are false ribs?

A

ribs 8, 9 and usually 10. their cartilages connect to the cartilages of the ribs above them so they have an indirect connection to the sternum

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10
Q

what are floating ribs?

A

ribs 11, 12 and sometimes 10. they do not connect to sternum, instead they end in the posterior abdominal musculature.

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11
Q

what are typical ribs?

A

ribs 3-9. have head, neck, (connects head of rib with body at tubercle), tubercle, body/shaft

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12
Q

which are the atypical ribs?

A

1,2, 10-12

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13
Q

what is the intercostal space?

A

separate ribs and their costal cartilages from each other.

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14
Q

what do the thoracic vertebrae do?

A

gives bony protection to spinal cord, posture and support, attachment points for ligaments

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15
Q

what are the parts of the thoracic vertebrae?

A

body, transverse process, spinous process, lamina, pedicles, vertebra foramen, demi/costal facets where ribs attach.

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16
Q

where do spinal nerves pass?

A

from the spinal cord between the superior and inferior pedicles of vertebrae

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17
Q

what is the sternum?

A

flat, elongated bone

18
Q

what are the parts of the sternum?

A

manubrium, jugular notch, body, and xiphoid process.

19
Q

what makes up the superior thoracic aperture?

A

vertebra T1, first pair of ribs and cartilage, superior border of manubrium, jugular notch, clavicle, apex of lungs, and the brachial plexus.

20
Q

what is the brachial plexus?

A

network of nerves that supply the upper extremities.

21
Q

what makes up the inferior thoracic aperture?

A

12th thoracic vertebra, 11-12th rib pairs, costal cartilage of 7-10. xiphisternal joint, xiphoid process, costal arch, diaphragm, blood vessels

22
Q

what is the intra-articular ligament of the head of the rib?

A

it divides the joint into 2 synovial cavities

23
Q

radiate ligament?

A

fans out from head of rib

24
Q

costotransverse ligament?

A

from tubercl to tip of the transverse process

25
Q

superior costotransverse ligament?

A

joins crest of neck of rib to transverse process superior to it.

26
Q

what is the type of joint and articulation of the Intervetebral joint?

A

symphysis (secondary cartilaginous)

adjacent vertebral bodies bound together by IV disc.

27
Q

what are the ligaments and comments of the intervetebral joint?

A

anterior and posterior longitudinal

movement limited to small degrees of rotation

28
Q

what is the type and articulation of the joint of head of rib (costotransverse)

A

synovial plane joint. head of each rib with superior demifacet of v. body of same number, the inferior demifacet of the v body superior to it and the IV disc between them.

29
Q

what are the ligaments and comments of the joint of head of rib?

A

radiate, intra-articular ligament of head of rib. 1st, 11th, and 12th and sometimes 10 articulate only with the v. body of same number

30
Q

what is the type and attachment of the costotransverse joint?

A

synovial plane joint. rib tubercle with the transverse process of vertebra of same number

31
Q

what are the ligaments and comments of the costotransverse joint?

A

lateral and superior costotransnverse. 11th and 12th ribs do not articulate with transverse processes of vertebrae of the same number.

32
Q

what is the type and articulation of the costochondral joint?

A

primary (hyaline) cartilaginous joint. lateral end of the costal cartilage and the sternal end of the rib.

33
Q

what are the ligaments and comments of the costochondral joint?

A

cartilage and bone bound together by periosteum. no movement occurs at this joint; costal cartilage provides flexibility.

34
Q

what is the type and articulations of the interchondral joint?

A

synovial plane joint. between costal cartilages of 6-7, 7-8, 8-9

35
Q

what are the ligaments and comments of the interchondral joint?

A

interchondral ligaments, articulation between costal cartilages 9 and 10 are fibrous

36
Q

what is the type and articulation of the sternocostal joint?

A

1st- primary cartilaginous joint (synchondrosis) - articulation of 1st costal cartilages with manubrium of sternum

2nd-7th - synovial plane joint - articulation of the 2-7th pair ribs of costal cartilages with sternum

37
Q

what are the ligaments and comments of the sternocostal joint?

A

anterior and posterior radiate ligament, intra-articular. articular cavities often absent; fibrocartilage covers articular surfaces.

38
Q

what is the type and articulations of the sternoclavicular joint?

A

saddle type synovial joint. sternal end of clavicles with manubrium of sternum and 1st costal cartilage

39
Q

what are the ligaments and comments of the sternoclavicular joint?

A

anterior and posterior sternoclavicular ligaments, costoclavicular ligament. this joint is divided into two compartments by an articular disc.

40
Q

what is the type and articulation of the manubriosternal joint?

A

secondary cartilaginous joint (symphysis). articulation between manubrium and body of sternum.

41
Q

what is the type and articulation of the xiphisternal joint?

A

primary cartilaginous joint (synchondrosis). articulation between xiphoid process and body of sternum.

42
Q

what are the comments for the manubriosternal joint and the xiphisternal joint?

A

these joints often fuse and become synostoses in older individuals.