vertebrae ribs and paravertebral muscle Flashcards
function of vertebral column
Supports trunk and weight of body
the VC extend from what to what
Extends from base of skull to pelvis
function of intervertebral disc
shock absorption
vertebra are held in place by
- Intervertebral Discs • Intervertebral ligaments
* Deep muscles of the back
function of vertebra
Enclose/protect spinal cord
• Support head
• Attachment for ribs, pelvis, muscles of the back
what are the 5 region of the VC and how many vertebral in each
- Divided into 5 regions: • 7 Cervical
- 12 Thoracic
- 5 Lumbar
- 5 Sacral (fused)
- 4 (3-5) coccygeal (fused)
what make the vertebral arch
pedicle and lamina
type of joint of the vertebra
Zygapophysealjoints (D.S.A.)
which vertebrae is smaller and lighter
Cervical
which vertebra are the most mobile of the C-spine
C4-C5, C5-C6
which C-spine vertebra are often bifid
c2-c6
which vertebrae provide support for the head
cervical
atlas articulate with what
occipital condyle
which vertebra doesn’t have a body
atlas
which vertebrae allow for flexion and extension motion of head (yes)
atlas
function of atlas
Allows for flexion and extension motion of head (nodding “yes”)
carateristic of atlas
absence of body
characteristic of axis
odontoid process + dens
c1 is atlas or axis
atlas
which vertebra is affected in whiplash injuries
axis (C2)
function of axis
When rotating from side to side (“no”), atlas pivots
around the odontoid process
which vertebra is the only one articulate with ribs
Thoracic
which type of joint is the join btw thoracic and ribs
costovertebral
characteristic of thoracic vertebra
Unique to have smooth facets on their bodies and t-process to articulate with Except T11-T12
Long pointed spinous process projecting down
what limited the mvt in T-spine
long pointed spinous process
which T-spin vertebra does avec smooth facet on their bodies
T11-T12
which vertebra is the thicker and larger one
lumbar
function of L4-L5 and L5-S1
allow significant flexion and extension movements therefore disc/facet degeneration are common at those levels
what happen at the level of L1
the spinal cord ends and the cauda equina begins.
wherethe spinal cord ends and the cauda equina begins
L1
which bone form the posterior part of pelvis
sacrum
the sacrum fused around the aged of
30
is the spinous still present in the sacrum
yes as the median sacral crest
what the opening along side of median sacral crest
Dorsal sacral foramina
• Ventral sacral foramina
around which aged the coccyx is fused
20-30
spinal curve are affected by what
- Posture
- Activity
- Obesity
- Pregnancy • Trauma
- Disease
what is lordosis
exaggerated curving in the L-spine
what is kyphosis
exaggerated curving in the T-spine
what is scoliosis
lateral deviation of the spine from the midline
name of the outer fibrous ring of intervertebral disc
annulons fibroses
which vertebra has no dises
No discs are found between the occiput and C1, and between C1 and C2.
where is the last disc found
btw
S5 and co1
name of the inner highly elastic structure of intervertebral disc
nucleus pulposus
what is the annulus fibrosus
Outer fibrous ring
what is nucleus pulposus
Inner highly elastic structure
what is include in the thoracic cage
T-vertebrae, sternum, and ribs
whatForms partial enclosure around organs of chest
thoracic cage
what is support by thoracic cage
shoulder girdle and upper limbs
what is sealed by the thoracic diaphragm
inf portion of thoracic cage
what is the sternum and where is located
Flat, narrow bone located along the vertical midline of chest
3 major part of sternum
manubrium (sup) body (middle) xyphoid process (inf)
which part of sternum is located at 1st ribs
manubrium
which part of sternum is located at ribs 2-10
body
the xyphoid process ossifies complete by age
40
sternum articulate with
Articulates with 2 clavicles superiorly & ribs by way of cartilages along its lat. borders
how many pair of ribs is there
12
each ribs pair attached to
T-vertebraeon body and
transverse process)
the ribs attach to sternum via
costal cartilage
which ribs are true, false and floating
true= 1st 7 pair
remaining 5 paire= false
last 2 pairs= floating
characteristic of a typical ribs
- Shaft
- Head
- Tubercle
- Costal groove
space btw each ribs =
intercostal space
ribs mvt = % of respiratory effort
25
function of superficial of paravdrtebral muscle
control limb mvt
function of intermidiate group
control respiratory mvt
most nerve supply of superficial paravertebral muscle
from ventral ramis of cervucal nerves
which muscle is part of paravertebral superficial group
Trapezius
• Latissimus dorsi • Levator scapulae • Rhomboids
which muscle is part of peravertebral intermediate muscle group
Serratus posterior superior (deep to rhomboids)Serratus posterior inferior (deep to latissimus dorsi)
which muscle is deep to rhomboid
Serratus posterior superior
which muscle is deep to lat dorsi
Serratus posterior inferior
what is innervated by last 4 intercostal nerves
serratus posterior interior
what innervated the serrates posterior superior
1st 4 intercostal nerves
what innervated the deep intrinsic paravertebral muscle
dorsal rami of spinal nerve
function of deep paravertebral muscle
Maintain posture, control movements of the vertebral column
which group of paravertebral muscle extend from pelvis to skull
deep
attachement of deep muscle paravertebral medially
attaches medially to ligamentum nuchae, spinous process, supraspinous ligament and median sacral crest
attachement of deep muscle paravertebral muscle laterally
attaches laterally to cervical and lumbar transverse process and rib angles
what make the thoracolumbar fascia
thoracic and lumbar part of deep paravertebral muscle groupe
where is located the splenius muscle
posterolateral aspect neck
what covers the splenius
covers vertical neck muscles, hold deep muscles in position
the splenius is part of which layer of paravertebral muscle
superficial (intrisct)
function of erector spina
chief extensor muscles of vertebral column
what are the 3 muscle that make the erector spina group
- Iliocostalis (lateral)
- Longissimus (intermediate)
- Spinalis (medial)
name the 3 muscle of erector spinae from lateral to medial
- Iliocostalis (lateral)
- Longissimus (intermediate)
- Spinalis (medial)
erector spina is part of which layer of paravrtebral muscle
intermediate instruct
which muscle make up the deep intrinsic muscle
- Semispinalis (capitis, thoracis, cervicis)*
- Multifidus*
- Rotatores*
- Interspinalis
- Intertransversarii
- Levator Costarum
what is an other name for the deep inartistic muscle
transversospinal muscle group