Bones: Spinal Column and Ribcage Flashcards

Coccyx
- small, triangular “tailbone”
15
linea terminalis
entire circular ridge of the pelvis

body of rib
- AKA shaft, begins at angle, curves anteriorly
the head and tubercle of the rib connect to what facets?
where are these facets?
4, costovertebral articular facet and 10, costotransverse articular facet
- on the vertebral body and transverse process, resepectively

costal groove
- nerves and blood vessels to thoracic wall pass here
red arrow

head of rib
- articulates with vertebra
part between head and tubercle

neck of rib
5
tubercle of rib
- articulates with transverse process of vertebra
rib overview
- 12 pairs total
- 7 pairs “true” ribs that connect to the sternum via their own cartilages
- 5 pairs “false” ribs attach indirectly (or not at all)
- 2 pairs “floating” ribs don’t attach to sternum at all
any of the green area
costal cartilage
- connect ribs to sternum
14
sacral canal
10
sacral promontory
6
sacral tuberosity
12
Ala/ wing
lateral part of the sacrum
Whole bone

Sacrum
- 5 fused vertebrae
- forms posterior wall of pelvis
11
anterior sacral foramina

base of sacrum
2
dorsal sacral foramina
3
sacral hiatus
7
intermediate sacral crest
4
medial sacral line
4

Sacral Horns or Cornua
green highlighted feature

superior articular process of the sacrum
13
transverse lines or ridges of sacrum
4
medial sacral crest

sternal angle
- where manubrium and body meet

Sternum
- AKA breastbone
know:
- Manubrium
- Body
- Xiphoid Process
- Jugular Notch
- Clavicular Notch
- Sternal Angle

body of sternum

clavicular notch of sternum\
-articulates w clavicle
number 1

jugular notch of manubrium

manubrium
- shaped like knot of necktie

xiphoid process
-bottom of sternum, shaped like tongue

Typical Thoracic Vertebrae
- costal facets on transverse processes and bodies
- body is round to heart-shaped
- vertebral foramen is circular
- long inferiorly oriented spinous process
- articular facets lie in frontal plane, allowing rotation
- 12 total
green
pedicles of lumbar vertebra

vertebral arch
- made up of pair of pedicles and laminae
- green space

vertebral foramen
- space for spinal cord to thread through all vertebrae
4

spinous process
6

inferior articular process
what’s this whole bone?
atlas
- first cervical vertebra
- aritculates with occipital condyles and dens of axis

axis vertebra
- second cervical vertebra
- has dens, superiorly extending process acts as pivot for rotation of skull
red dotted features

costal facets of thoracic vertebrae
- these are the transverse costal facets on the transverse processes, the superior costal facets lie on the sides of the vertebral body
orange
spinous process
whole bone
what distinguishes this kind from the other kinds?

Typical Lumbar Vertebrae
- thick, oval/kidney-shaped body
- triangular vertebral foramen
- short, flat, hatchet-shaped spinous process points straight back
- articular processes lie in sagittal plane, allowing flexion/extension but little rotation
- 5 total
7
pedicle of thoracic vertebra

2

posterior tubercle of cervical vertebra
part 1

spinous process
7

superior articular facet
10
superior articular process
- articulates with inferior articular process of vertebrae above
8
superior demifacet
yellow
superior articular process

Dens
- articulates with atlas to allow rotation of head
also called Odontoid Process
11

transverse process

Typical Cervical Vertebrae (C3-7)
- wide body
- forked spinous process point directly posteriorly
- large, triangular vertebral foramen
- have transverse foramen (for vertebral blood vessels)
- obliquely oriented articular facets allow wide range of neck movement
- 7 total, including atlas and axis
12
superior and inferior demifacets
- articulate with ribs

inferior articular process
- articulates with superior articular process of vertbrae below
pieces between vertebrae

intervertebral discs
- pads of fibrocartilage
indicated by black arrows

intervertebral foramen
- formed by articulation of 2 vertebrae
- passage for spinal nerves
3

lamina
5
lamina

purple
lamina
red
transverse process
8

pedicle
number 1
transverse foramen
- only in cervical vertebrae
- vertebral veins/arteries pass through here
part 3

transverse process
- in thoracic, have costal facets for rib tubercles
1

anterior tubercle
kidney shaped portion of left image

Body of Vertebrae
- thick anterior region, weight-bearing
What bone is this?

1st Rib
- small and flattened compared to others
4 on bone on right

Groove for Subclavian Artery
- more lateral groove of the two on the 1st rib
- closer to the head end of the rib
6 on bone on the right

Groove for the Subclavian Vein
- more medial of the two grooves on 1st rib
- groove closest to the sternal end of the rib
5 on the bone on the right

Scalene Tubercle of First Rib
- attachment for the anterior scalenus muscle
What is the bottom bone?
What is the red area on it?

2nd Rib
Tuberosity for the Serratus Anterior Muscle
What’s the yellow marked area?
And what kind of vertebra is this?

Groove for Spinal Nerve
- typical cervical vertebrae have a groove on their transverse processes for spinal nerves
What is the blue marked vertebra?
Both its number and its latin name.
What makes it special?

C7 or Vertebra Prominens
- it has a particularly large spinous process and is the most readily palpable vertebra in the neck, marking the transition from cervical to thoracic vertebrae