The Thorax: Bones and Joints Flashcards
upper part of the trunk, is a cage composed of bones and cartilages, which affords protection for several very vital organs; the heart with its trunk vessels and the respiratory organs.
The Thorax
The skeleton of the thorax includes
(TV, S, R, C)
Thoracic vertebra
Sternum — breast bones
Ribs or costae — 12 pairs
Costa cartilages — 12 pairs
Joints of the Thorax
between a rib and the body of a vertebra
Costovertebral
Joints of the Thorax
between a rib and a transverse process of a vertebra
Costotransverse
Joints of the Thorax
between a rib cartilage and the sternum
Sternocostal or costosternal
Joints of the Thorax
between a rib and its costal cartilage
Costochondral
Joints of the Thorax
between the adjacent anterior margins of costal cartilage of 6th to 10th ribs.
Interchondral
Joints of the Thorax
between the sternum and the clavicle
Sternoclavicular
Joints of the Thorax
between the manubrium and the body of the sternum
Manubriosternal
Joints of the Thorax
between the body of the sternum and its xiphoid process
Xiphisternal
Parts and Prominences of the Thorax
flat bone
Sternum
Parts and Prominences of the Thorax
Jugular notch (suprasternal notch)
Clavicular notches
Costal notches — complete and half
Manubrium
Parts and Prominences of the Thorax
Costal notches — 4 and half notches
Body or gladiolus
Parts and Prominences of the Thorax
one-half notch
Xiphoid process
Parts and Prominences of the Thorax
Dorsal extremity or vertebral extremity (end)
Body or shaft with an angle
Ventral extremity or sternal extremity
Ribs pairs - 12 pairs
Parts and Prominences of the Thorax
is a long bone that lies vertically in the midline of the anterior chest wall.
The Sternum
Parts and Prominences of the Thorax
What are the 3 parts of the Sternum
- Manubrium
- Clavicular Notches - The body or gladiolus
- Sternal angle - Xiphoid process
- Costal notches
Parts and Prominences of the Thorax
the upper part and represents the handle of the sword.
Manubrium
Parts and Prominences of the Thorax
depression on the upper surface of the manubrium.
Clavicular notches
Parts and Prominences of the Thorax
extends from the manubrium to the xiphoid process and is the largest part of the sternum.
The body or gladiolus
Parts and Prominences of the Thorax
is marked by a prominent transverse ridge at the junction of the manubrium and the body of sternum
Sternal angle (angle of Louis or Ludwig)
Parts and Prominences of the Thorax
inferior part of the sternum bone
Xiphoid process
Parts and Prominences of the Thorax
are niches on the lateral margins of the sternum
Costal notches
Parts and Prominences of the Thorax
long, curved, flat bones that form the posterior wall, lateral walls and part of the anterior wall of the thorax.
Ribs
Parts and Prominences of the Thorax
Parts of the Ribs
Dorsal extremity
The body
The ventral or sternal extremity
Parts and Prominences of the Thorax
Parts of the Dorsal extremity of the Ribs
Head
Neck
Tubercle
Parts and Prominences of the Thorax
slightly expanded posterior end
Dorsal Extremity
Head
Parts and Prominences of the Thorax
slightly constricted part connecting the head to the body
Dorsal Extremity
Neck
Parts and Prominences of the Thorax
small prominence on the dorsal surface at the junction of the neck and body
Dorsal Extremity
Tubercle
Parts and Prominences of the Thorax
long flat, curved part that extends from the neck around the chest wall. At its lower margin there is a groove- the costal groove — for an intercostal artery, vein and nerve.
Ribs
The body
Parts and Prominences of the Thorax
a prominence in front of the neck where the rib becomes bent anteriorly.
Ribs
Angle of a rib
Parts and Prominences of the Thorax
a prominence in front of the neck where the rib becomes bent anteriorly.
Ribs
Angle of a rib
Parts and Prominences of the Thorax
anterior end that articulates with its costal cartilage.
Ribs
The ventral or sternal extremity
Parts and Prominences of the Thorax
has 2 grooves running transversely on its upper anterior surface for the subclavian artery and vein.
The ventral or sternal extremity
The first rib
Parts and Prominences of the Thorax
have a single articular surface on the head, not two
The ventral or sternal extremity
The 1st, 10th, 11th and 12th ribs
Parts and Prominences of the Thorax
have no tubercles
The ventral or sternal extremity
The 11th and 12th ribs
Parts and Prominences of the Thorax
12 pairs
Costal cartilages
Parts and Prominences of the Thorax
articulating with the sternum separately
Costal cartilages
Seven upper ribs
Parts and Prominences of the Thorax
join the cartilage of rib above
Costal cartilages
8th, 9th, and 10th
Parts and Prominences of the Thorax
have free anterior ends are so floating
Costal cartilages
11th and 12th
Parts and Prominences of the Thorax
How many pairs does the True and False ribs have
True ribs - upper seven pairs
False ribs - lower five pairs
Parts and Prominences of the Thorax
How many pairs does the True and False ribs have
True ribs - upper seven pairs
False ribs - lower five pairs
Parts and Prominences of the Thorax
Alternate classifications
Vertebrosternal
Vertebrochondral
Vertebral ribs
Parts and Prominences of the Thorax
upper seven pairs
Alternate classifications
Verterbrosternal
Parts and Prominences of the Thorax
8th, 9th, and 10th pairs
Alternate classifications
Vertebrochondral
Parts and Prominences of the Thorax
11th and 12th pairs
Alternate Classifications
Vertebral ribs
Parts and Prominences of the Thorax
flat plates of cartilages similar in shape to the adjacent rib.
Costal Cartilages
Parts and Prominences of the Thorax
curved formed by the anterior margins of the 8”, 9” and costal cartilages on each side and the rounded tip of the xiphoid process.
Costal Cartilages
Costal arch
Structures Forming the Joints of the Thorax
What are the structures forming the joints of the Thorax (9)
- Intervertebral and Interarticular joints
- Costovertebral joints
- Costotransverse joints
- Costochondral joints
- Sternocostal or costosternal joints
- Interchondral joints
- Sternoclavicular joints
- Manubriosternal joints
- Xiphesternal or xiphosternal joints
Structures Forming the Joints of the Thorax
Joints of head of ribs and vertebral bodies
Costovertebral Joints
Structures Forming the Joints of the Thorax
What type of joint is the Costovertebral joint
Synovial joint
Structures Forming the Joints of the Thorax
The movements of the ribs increase the anteroposterior and lateral diameters of chest at inspiration, while the descent of the diaphragm increases the vertical diameter
Except for 11th and 12th rib
Costotransverse joints
Structure Forming the Joints of the Thorax
located at the anterior, or sternal, end of a rib and the adjacent costal cartilage.
Costochondral joints
Structure Forming the Joints of the Thorax
Formed by the sternal (anterior) end of a costal cartilage articulating with a costal notch
on the lateral margin of the sternum. (upper 7)
Sternocostal or costosternal joints
Structures Forming the Joints of the Thorax
What kind of joint is the sternocostal or costosternal joint
Synovial - sliding/gliding/planar joint
Structure Forming the Joints of the Thorax
Located between adjacent anterior margins of the 7th, 8th, 9th and 10th costal cartilages
and the rib cartilage above each one.
Interchondral joints
Structure Forming the Joints of the Thorax
Between the sternal end of the clavicle and clavicular notch of the sternum
Sternoclavicular joint
Structure Forming the Joints of the Thorax
What kind of joint is the Sternoclavicular joint
Gliding Joint
Structure Forming the Joints of the Thorax
Between the inferior margin of the manubrium and the upper margin of the body of the sternum, at the sternal angle
Manubriosternal Joint
Structure Forming the Joints of the Thorax
What kind of joint is the Manubriosternal Joint
Cartilaginious joint
Structure Forming the Joints of the Thorax
located between the inferior end of the body of the sternum and the xiphoid process of the sternum
Xiphesternal or xiphosternal joint
Structure Forming the Joints of the Thorax
What kind of joint is the Xiphesternal/Xiphosternal joint
cartilaginous joint
Congenital Anomalies of the Bones of the Thorax
an extra rib may be present on one or both sides above the first rib.
Cervical ribs
Congenital Anomalies of the Bones of the Thorax
short extra rib that may be present below the 12th rib
Lumbar ribs
Congenital Anomalies of the Bones of the Thorax
one or more ribs may be absent on one or both sides
Absence of ribs
Congenital Anomalies of the Bones of the Thorax
the anterior or sternal end of a rib may divide into two parts.
Forked ribs
Congenital Anomalies of the Bones of the Thorax
the sternum may be depressed so that it lies closer to the thoracic vertebrae than usual.
Pectus excavatum
Congenital Anomalies of the Bones of the Thorax
promiment sternum may be present
Pigeon chest
Landmarks — Prominences of the Bones of the Chest
Jugular notch
Sternal Angle
Xiphisternal joint
Costal Arch