Anatomy Flashcards
How many thoracic vertebrae and lumbars do dogs and horses have?
Horse 18 Thoracic 6 lumbar
Dogs 13 Thoracics, 7 Lumbar
What surfaces form the spinal canal?
How is the cord suspended in canal?
The vertebral canal contains the spinal cord until what level on horse and dog
Lamina, pedicle and dorsal surafce of vertebral body.
The dentate ligaments
Horse - L3
Dog- L4/5
Articular processes - how many in thoracolumbar region on each vert
Each vertebrae has 2 cranial and 2 caudal facets.
Chiro adjustments move along line of facets
What are the boundaries of the intervertebral Foramen?
Pedicles, intevertebral disc, ligamentum flavum, joint capsule of articular facet.
Problems with any of these structures can interfere with the size of the foramen and therefore crowd the contents.
What are the contents of the inteverteral foramen
Nerves:
- Soinal Nerve
- Dorsal root ganglia
- Recurrent meningeal nerve (ie branch of the spinal nerve that supplies disc, dorsal longitudinal ligaments and meninges.
Dural Extension
-Dura mater that followspinal nerve through the IVF
Cerebral spinal fluid - CSF circulates between dural extension and radicular nerve
Intervertebral veins -Carry blood supply from V venous sinus Spinal artery Connnective tissue- tissue folling in spaces between already mentioned structures. Adipose tissue Lymphatic vessels Intraforaminal ligaments
Lumbar Vertebrae Equine Bovine Canine Feline How many do each have
and what about typical lumbars?
Which was day SP point?
Equine: 5
Bovine: 6
Canine 6
feline 7
Typical Lumbars
Equine 2-4
Canine 2-6
SP point cranially
how many joint surfaces do a typical L vert have? What are they?
Facet joints Disc joint Intertransverse joints (only horse, hippo and rhino) always between L6 and sacrum. sometimes also between L4, L5 and L6
Typical lumbar vert has 6 joint surfaces.
Which way does the caudal articular processes face?
Cranial Articular processes?
Mammillary process
Caudal: face lateral and ventral
Cranial: facets face medial with concave dish
Facets are in sagitall plane.
Mammillary: Projects lateral
Thoracic Vertebrae
How many in Equine and Canine?
Which of those are typical?
Equine: 18, arabian 17 sometimes, or 19
Canine and Feline: 13, sometimes 12
Typical Thoracics
Equine 2-14
Canine 2-8
How many joint surfaces are on typical thoracic vertebrae
12 joint surfaces: Facets =4 Disc joints 2 Costovertebral Joints 4 Costotransverse = 2
Tell me which SP point in which direction for thoracics in Equine patient
T1-15- caudally
T16- anticlinal straight
T17-T18 points cranially
At T16 the shape and position of the facet joints changes
Thoracic Vertebrae Canine, which way do they point
SP of T1-10 point caudally
SP of T11 straight- anticlinal region
T12-T13 point cranially
Cranial joint surfaces pf T10 are coronal, then the caudal joint surfaces are sagittal
Cranial area of T spine (equine is T2-T12), Canine is T2- T10.
Which way is facet joints facing.
Cranial joint surfaces are located on the roof of the vertebral canal at the base of the SP and face dorsal and lateral
Caudal joint surfaces face ventral and medial
Equine Ribs, how many pairs?
18 pairs
8 of them articulate directly with sternum, canine 9 of them do.
TOPOGRAPHY Equine
The first palpable T vert is?
The withers ends at?
the lumbar spine begins at the end of the?
The last well palpable SP in the Lspine is
The which joint is located right in front of PSIS
In between the PSIS is?
The first bony prominence behind PSIS is S2,
■ The first palpable thoracic vertebra is T3
■ The withers ends at T8 (T9 / T10)
■ The lumbar spine begins at the end of the saddle area
■ The last well palpable spinous process is the one of L5
■ L6 is in most horses very difficult to palpate
■ The lumbosacral joint is right in front of the PSIS
■ In between the PSISs is S1
■ The first boney prominence behind the PSISs is S2, the second tubercle of the sacrum