Spine anatomy Flashcards
How many vertebrae does the cervical have?
Cervical has 7 vertebrates
How many vertebrae does the thoracic have?
Thoracic has 12 vertebrates
How many vertebrae does the lumbar have?
Lumbar has 5 vertebrates
How many vertebrae does the sacrum have?
Sacrum has 5 vertebrates(Fused)
How many vertebrates does the coccyx have?
Coccyx has 4 vertebrates(Fused)
How many vertebrates are there in total and how many of which are moveable?
33 vertebrates in total of which 24 are moveable
Where do the primary curves(thorax and sacral) develop?
-Thorax and sacral curves develop in utero
Secondary curves of the spine
- Cervical(Lordosis)
- Thoracic(Kyphosis)
- Lumbar(Lordosis)
- Sacral(Kyphosis)
- Coccyx(Tailbone)
What is the size and shape of the C-spine?
Small, oval shaped vertebral bodies
Properties of the vertebral arch and vertebral foramen of C-spine
Relatively wide vertebral arch with large vertebral foramen
C-spine properties
Relatively long, bifid (except for C7) inferiorly pointing spinous processes
What does the transverse foramina protect?
Transverse foramina protecting the vertebral arteries and veins
What is the size and shape of T spine?
Medium sized, heart shaped vertebral bodies
What is the size of the vertebral canals of the T spine?
Medium sized vertebral canals
Properties of the T spine
- Prominent transverse process with costal facets
- Long spinous processes angulating downwards
- Articulation with ribs
What joints does the T spine form?
Form costotransverse and costovertebral joints
What structures pass through the anterior sacral foramina?
-Anterior primary branches (rami) of the sacral nerves and lateral sacral arteries and veins
What joint is formed when the sacrum articulates with the ilium bones?
-Articulate with ilium bones forming sacroiliac joints
Size of cervical
Small
Foramina of cervical
One vertebral and two transverse
Spinous processes of cervical
Slender, often bifid(C2-C6)
Transverse processes of cervical
Small
Articular facets for ribs of cervical
Absent
Direction of articular facets of cervical(Superior)
Posterosuperior
Direction of articular facets of cervical(Inferior)
Anteroinferior
Size of the intervertebral discs of the cervical
Thick relative to the size of vertebral bodies
Size of thoracic
Medium
Foramina of thoracic
One vertebral
Spinous process of the thoracic
Long, fairly thick
Transverse process of thoracic
Fairly large
Articular facets for ribs of thoracic
Present
Direction of articular facets of thoracic(Superior)
Posterolateral
Direction of articular facets of thoracic(Inferior)
Anteromedial
Size of intervertebral discs of thoracic
Thin relative to the size of vertebral bodies
Size of lumbar
Large
Foramina of lumbar
One vertebral
Spinous processes of lumbar
Short, blunt
Transverse processes of lumbar
Large and blunt
Articular facets for ribs of lumbar
Absent
Direction of articular facets of lumbar(Superior)
Medial
Direction of articular facets of lumbar(Inferior)
Lateral
Size of intervertebral discs of lumbar
thickest
What is the zygapophyseal joint?
Zygapophyseal joint is a synovial facet joint between the superior articular process of one vertebra and the inferior process of the vertebrae above it.
What is the intervertebral joint?
Intervertebral joints is a cartilaginous joint that allows slight movement of the vertebrae and acts similar to a vertebrae in holding the vertebrae together
What is the costovertebral joint?
Costovertebral joint is a synovial plane joint that connects the head of the ribs with the bodies of the thoracic vertebrae.
What is the pad of fibrocartilage of intervertebral discs attached permanently to?
Pad of fibrocartilage attached permanently to the vertebral bodies
What is the annulus fibrosus of the intervertebral disc?
- Tough outer cartilage
- Concentric rings
What do the intervertebral discs allow?
Allow movement between vertebrate and shock absorption
What are the 3 erector spinae muscles?
- Iliocostalis muscle
- Longissimus muscle
- Spinalis muscle
Layers of the meninges of the spinal cord?
- Dura mater
- Arachnoid space
- Pia mater
Path of nerves through vertebrate
- Afferent sensory information arrives via dorsal root ganglion
- Transmitted through the dorsal and lateral horn, through the somatic sensory nuclei, visceral sensory nuclei, autonomic efferent nuclei and somatic motor nuclei respectively.
- Efferent signals leave through the ventral root to muscles and glands
How many nerves does the C spine have?
8 nerves
How do the nerves C2-C7 emerge?
Nerves C2-C7 emerge superior to pedicles
How do C8 nerves emerge?
Nerve C8 emerges inferior to pedicle to C7 vertebra
How do the nerves T1 to coccyx emerge?
Nerves T1 to coccyx emerge inferior to pedicles of their respective vertebrae