Thoracic Vertebra Flashcards
What features will allow discrimination between T2-T4 and T5-T8 segmental groups?
Vertebral body
Transverse process
Articular process
Spinous process
What is the outline of the vertebral body of a typical thoracic from superior view?
Triangular
On cranial view, what is the outline of the vertebral body for the T5-T8 group?
Left side of the vertebral body will be flattened and the right side convex
What is the name given to the left side appearance of the vertebral body of T5-T8?
Aortic impression
What part of the vertebral body is most influenced by the aorta at T5-T8?
Left side of the superior and inferior epiphyseal rims
What is the height pattern of the typical thoracic vertebral body?
Posterior height is greater than the anterior height by one to two millimeters
What is the principal cause of the posterior curve of the thoracic spine?
vertebral body height differences
In terms of the anterior-posterior curves of the vertebral column, what direction will the thoracic spine face?
Posterior
What is another way of naming a posterior curve pattern?
Kyphotic curve
What joint classifications are identified at the vertebral body of a typical thoracic?
Fibrous (amphiarthrosis) syndesmosis
Cartilaginous (amphiarthrosis) symphysis
Synovial plane (diarthrosis arthrodia)
How many synovial joints are formed at the vertebral body of a typical thoracic?
4
How many symphysis joints are formed with the vertebral body of a typical thoracic?
2
How many syndesmosis joints are formed at the vertebral body of a typical thoracic?
Typically 4 are identified (as many as 8 if the costocentral stellate/radiate ligaments are included)
How many joints are formed at the vertebral body of a typical thoracic?
Typically 10 (fourteen if the costocentral stellate/radiate ligaments are included)
What is the name given to the joint formed between the vertebral body and rib?
Costocentral joint
How many costocentral joints are formed at the vertebral body of a typical thoracic?
4
Which of the demi-facets on the vertebral body of a typical thoracic is larger?
Superior costal demi-facet
What ligaments support the costocentral joint?
Costocentral stellate/radiate ligament
Costocentral interarticular or intra-articular ligament
The costocentral stellate/ radiate ligament will attach to which segments at the T3 spinal nerve intervertebral foramen?
Vertebral body of T3
Vertebral body of T4
Which muscle is attached to the vertebral body of T2 or T3?
Longus colli
Which X-ray view is used to see into the intervertebral foramen of a typical thoracic?
Lateral view
What is overlap of the lamina called in the typical thoracic region?
Shingling
What is the outline of the vertebral foramen in the typical thoracic region?
Oval or circular
In which plane will the size of the vertebral foramen of a typical thoracic be greatest?
Transverse plane
Vertebral transverse diameter
What are the osseous parts of the costotransverse joint?
Transverse costal facet
Articular surface of the tubercle of a rib
What ligaments support the costotransverse joint of a typical thoracic?
Superior costotransverse ligament
Inferior costotransverse ligament
Lateral costotransverse ligament
Which muscles may attach to the transverse process of a typical thoracic?
Longissimus thoracis Longissimus cervicis Longissimus capitis Semispinalis thoracis Semispinalis cervicis Semispinalis capitis Multifidis Rotator longus Rotator brevis Intertransversarii Levator costarum longus Levator costarum brevis
How can you distinguish between a T2-T4 from T5-T8 segment using the articular process?
T2-T4: the width between the superior articular process is greater than the width between the inferior articular process of that vertebra
T5-T8: the width between the superior articular process is equal to or the same as the width between the inferior articular processes of that vertebra
What is the orientation of the superior articular facet of a typical thoracic?
They face backward, upward, and lateral (BUL)
What is the orientation of the inferior articular facet of a typical thoracic?
They face forward, downward, and medial (ForMeD)
How many synovial joints are present at a typical thoracic?
10
How many synovial joint surfaces for ribs are present on a typical thoracic?
6
What is the name given to the overlap of spinous processes in the thoracic region?
Imbrication
Imbrication will be more pronounced for what region of the thoracics?
T5-T8
Which thoracic has the longest spinous process?
T8
What is the angulation of the spinous process in the typical thoracic region?
Undersurface of T2-T4 processes will angle up to forty degrees from the horizontal plane
Undersurface of T5-T8 processes will angle up to sixty degrees from the horizontal plane
Which muscles may attach to the spinous process of a typical thoracic?
Trapezius Latissimus dorsi Rhomboid major Serratus posterior superior Splenius cervicis Splenius capitis Spinalis thoracis Spinalis cervicis Spinalis capitis Semispinalis thoracis Multifidis Rotator longus Rotator brevis Interspinalis
What joint classifications are identified at the vertebral body of T1?
Fibrous (amphiathrosis) syndesmosis
Cartilaginous (amphiarthrosis) symphysis
Synovial plane (diarthrosis arthrodia joint)
Modified synovial saddle (diarthrosis sellar) only as variation
What are the osseous parts of the costotransverse joint of T1?
Transverse costal facet
Articular surface of the tubercle of a rib
What ligaments support the costotransverse joint of T1?
Inferior costotransverse ligament
Lateral costotransverse ligament
What ligament is absent at the costotransverse joint of T1?
Superior costotransverse ligament
The superior costotransverse ligament of the transvere process of T1 will attach to which rib?
2nd rib
What muscles attach to the transverse process of T1?
Longissimus thoracis Longissimus cervicis Longissimus capitis Semispinalis cervicis Semispinalis capitis Multifidis Rotator longus Rotator brevis Intertransversarii Levator costarum brevis
What is the orientation of the superior articular facet of T1?
They face backward, upward, lateral (BUL)
What is the orientation of the inferior articular facet of T1?
They face forward, downward, medial (ForMeD)
How many synovial joints are present at T1?
10
What muscles attach to the spinous process of T1?
Trapezius Rhomboid minor Serratus posterior superior Splenius capitis Spinalis thoracis Spinalis cervicis Spinalis capitis Semispinalis thoracis Multifidis Rotator longus Rotator brevis Interspinalis
Which muscles attach to the transverse process of T9?
Longissimus thoracis Semispinalis thoracis Multifidis Rotator longus Rotator brevis Intertransversarii Levator costarum longus Levator costarum brevis
How many synovial joints are typically present at T9?
10
Identify the synovial joint surfaces typically present on T9?
2 superior costal demi-facets 2 inferior costal demi-facets 2 superior articular facets 2 inferior articular facets 2 transverse costal facets
How many synovial joint surfaces for ribs are typically present on T9?
6
What is the generic appearance of the spinous process of T9?
Shorter and more horizontal
What muscles attach to the spinous process of T9?
Trapezius Latissimus dorsi Multifidis Rotator longus Rotator brevis Interspinalis
Which muscles are conspicuously absent at the T9 spinous process?
Spinalis
Semispinalis
How many synovial joints are formed at the vertebral body of T10?
2
How many symphysis joints are formed with the vertebral body of T10?
2
How many syndesmosis joints are formed at the vertebral body of T10?
Typically 4 are identified (as many as 8 if the costocentral stellate/radiate ligaments are included)
How many joints are typically formed at the vertebral body of T10?
Typically 8 (12 if the costocentral stellate/radiate ligaments are included)
Which synovial joint surface is absent from the vertebral body of T10?
Inferior costal demi-facets
Para-articular processes are more commonly observed on which segment of the spine?
T10
The superior costotransverse ligament of the T10 transverse process will attach to which rib?
11th rib
What muscles attach to the transverse process of T10?
Longissimus thoracis Semispinalis thoracis Multifidis Rotator longus Rotator brevis Intertransversarii Levator costarum longus Levator costarum brevis
Identify the synovial joint surfaces typically present on T10?
2 superior costal facets
2 transverse costal facets
2 superior articular facets
2 inferior articular facets
Which rib related facet is absent on T10?
Inferior costal demi-facet
A dimpling or depression of the skin in the thoracic region is often a characteristic of the location of which segment?
T10
What mucles attach to the spinous process of T10?
Trapezius Latissimus dorsi Multifidis Rotator longus Rotator brevis Interspinalis
Which erector spinae muscles will not attach to the spinous process of T10?
Spinalis
Longissimus
Iliocostalis
What joint classifications are present at T10?
Fibrous (amphiarthrosis) syndesmosis
Cartilaginous (amphiarthrosis) symphysis
Synovial plane (diarthrosis arthrodia)
What is the name given to T11?
Anticlinal vertebrae
What is the outline of the vertebral body of T11 on superior view?
Kidney-shaped or reniform
How many joints are typically formed at the vertebral body of T11?
Typically 8 (12 if the costocentral stellate/radiate ligaments are included)
Which ligaments of the costocentral joint is absent for the 11th rib?
Costocentral interarticular or intra-articular ligament
Which vertebrae is the largest segment to demonstrate a transverse costal facet?
T10
What ligaments form the costotransverse joint of T11?
Superior costotransverse
Slightly developed inferior costotransverse
Lateral costotransverse
Which costotransverse ligaments are absent at T11?
Capsular costotransverse ligament
What muscles attach to the transverse process of T11?
Longissimus thoracis Semispinalis thoracis Multifidis Rotator longus Rotator brevis Intertransversarii Levator costarum brevis
Which segment will be the last to demonstrate an attachment for the levator costarum longus?
T10
How many synovial joints are typically present at T11?
6
What muscles attach to the spinous process of T11?
Trapezius Latissimus dorsi Serratus posterior inferior Iliocostalis lumborum Spinalis thoracis Multifidis Rotator longus Rotator brevis Interspinalis
At which segments of the thoracic spine will the spinalis muscle not attach?
T9
T10
Which muscles of the 5 layers of the true back are present at the spinous process of T11?
Trapezius Latissimus dorsi Serratus posterior inferior Iliocostalis lumborum Spinalis thoracis Multifidis Rotator longus Rotator brevis
How many synovial joints are formed with the vertebral body of T12?
2
How many symphysis joints are formed at the vertebral body of T12?
2
How many joints are typically formed at the vertebral body of T12?
Typically 8 (10 if the costocentral stellate/radiate ligaments are included)
Which muscles attaching to the T11 spinous process would be representative of layer four?
Iliocostalis lumborum
Spinalis thoracis
What joint classifications are present at T11?
Fibrous (amphiarthrosis) syndesmosis
Cartilaginous (amphiarthrosis) symphysis
Synovial plane (diarthrosis arthrodia)
What is another way of naming a posterior curve pattern?
Kyphotic curve
What joint classifications are identified at the vertebral body of T12?
Fibrous (amohiarthrosis) syndesmosis
Cartilaginous (amphiarthrosis) symphysis
Synovial plane (diarthrosis arthrodia)
What muscles are attached to the vertebral body of T12?
Psoas major
Psoas minor
What does the lateral tubercle of T12 represent?
Transverse process
What does the superior tubercle of T12 represent?
Mammillary process of lumbar vertebrae
What does the inferior tubercle of T12 represent?
Accessory process of lumbar vertebrae
What ligaments form the costotransverse joint of the 12th rib?
Superior costotransverse ligament from T11
Lumbocostal ligament from L1
Which costotrasnverse ligaments are attached to T12?
None
Which costotransverse ligaments lack an attachment to T12?
Capsular costotransverse
Superior costotransverse
Inferior costotransverse
Lateral costotransverse
What muscles attach to the transverse process region of T12?
Longissimus thoracis Semispinalis thoracis Multifidis Rotator longus Rotator brevis Intertransversarii
Which rib-associated muscle is absent at the transverse process region of T12?
Levator costarum
Which segment is the last to demonstrate a levator costarum brevis attachment?
T11
Which segment is the last to demonstrate a levator costarum longus attachment?
T10
What is the orientation of the superior articular surface of T12?
Backward, upward, lateral (BUL)
What is the orientation of the inferior articular facets of T12?
Forward, downward, lateral (FoLD)
How many synovial joints are typically present at T12?
6
Identify the synovial joint surfaces typically present at T12?
2 superior costal facets
2 superior articular facets
2 inferior articular facets
Which muscles attach to the spinous process of T12?
Trapezius Latissimus dorsi Serratus posterior inferior iliocostalis lumborum Spinalis thoracis Multifidis Rotator longus Rotator brevis Interspinalis
Which erector spinae muscle is unique in its attachment to the T12 spinous process?
Iliocostalis lumborum
Which muscle attaching to the T12 spinous process are representative of layer 3?
Serratus posterior inferior
What joint classifications are present at T12?
Fibrous (amphiarthrosis) syndesmosis
Cartilaginous (amphiarthrosis) symphysis
Synovial (diarthrosis) arthrodia
Which muscles attach tot he vertebral body of thoracic vertebrae?
Longus colli
Psoas major
Psoas minor
Which thoracic segments will have muscles attaching to their vertebral bodies?
T1-T3
T12
Which thoracic segment is the last to demonstrate the attachment of the levator costarum brevis?
T11
Which thoracic segment is first to demonstrate the attchment of the levator costarum longus?
T7
Which thoracic segment is last to demonstrate the attachment of the levator costarum longus?
T10
Rhomboid major and rhomboid minor will attach to the spinous process of which thoracics?
T1 only
Which thoracic vertebrae will demonstrate a spinous process attachment for the serratus posterior superior?
T1-T3
Which thoracic vertebrae will demonstrate a spinous process attachment for the serratus posterior inferior?
T11-T12
Which thoracic vertebrae will demonstrate a spinous process attachment for the splenius muscles?
T1-T6
Which thoracics demonstrate a spinous process attachment for the iliocostalis lumborum?
T11-T12
Which thoracic vertebrae lack any spinalis muscle group attachment on their spinous process?
T9-T10
Which thoracic is the last to demonstrate a spinous process attachment for the semispinalis?
T6