Ribcage Flashcards
How many ribs are there
12
The bottom of the pec aligns in what rib
the 5th rib
Describe the shape of the top of the ribcage, that attaches to the neck
The top of the ribcage slants forward, “see neck”
Describe the back of the Thoracic arch
The thoracic arch curves back
Why can we sometimes see the the ribcage
The 10th rib has a sharp corner
The ribcage is made up of…
- The Thoracic vertebrae
- 12 pairs of ribs
- Costal cartilage
- Sternum
describe the movement of the ribs starting from the back
The ribs angle down slightly from the thoracic vertebrae, on the side plane they take a 45° turn downward and when the ribs meet the costal cartilage on the front plane they become horizontal , except the bottom one which curve upward to make the thoracic arch.
What parts of the ribs can be seen on people
The lower ribs can be seen on lean and muscular people in the front and back.
What is the significance of the 5th rib
- The bottom of the pec aligns with the 5th rib
- The top most digit of the external oblique originates at the 5th rib
- The first visible digit(the 4th) of the serratus originates at the fifth rib
In what circumstances can you see the costal cartilage
You can see the first few costal cartilage on a very lean person with thin muscles
Where are the most prominent digits of the serratus
The 6th 7th and 8th ribs
What makes up the Thoracic arch
The costal cartilage of the 7th, 8th, 9th, 10th ribs
when do the corners of the 10th ribs/Thoracic arch become more prominent
when the model is inhaling or ls leaning back.
How do artists usually idealize a female thoracic arch
60° and turning inward
How do artist usually idealize a male thoracic arch
90° and turning outward
What is the sternum made up of
The manubrium(The handle), the gladiolus(The Blade), and the xiphoid process(The sword)
Where do the clavicles attach
at the corners of the manubrium
describe the shape of the sternum
It’s thinner at the top than the bottom, on males the tip lands in-between the nipple and bottom of the pec.
describe the xiphoid process
The xiphoid process is the size of the tip of the thumb, it can poke out or dig in
