Osteology - Neck, Thorax, and Abdomen Flashcards
What runs through the transverse foramen?
Vertebral Artery, Vein, and Nerve
What do the transverse processes of C3-C6 exhibit?
- Dorsal tubercle - caudodorsal branch
- Ventral tubercle - cranioventral branch (known as ventral lamina in C6)
What is the ventral tubercle of the transverse process of C6 termed?
Ventral Lamina
Atlas:
Lateral vertebral foramen
Foramen that communicates with the vertebral foramen. It transmits the first cervical spinal nerve.
Atlas:
Wings
Well-developed transverse processes
Atlas:
Alar foramen
Foramen in the wing of the atlas in ungulates that transmits the ventral branch of the first cervical spinal nerve.
In carnivores, there is no alar foramen, instead there is an alar notch.
Atlas:
Atlantal fossa
The concavity in the ventral surface of the wing
Atlas:
Cranial articular fovea
Surface that articulates with the occipital condyles of the skull.
Atlas:
Caudal articular fovea
Surface that articulates with the cranial articular processes of the axis.
Atlas:
Ventral Arch –> Fovea Dentis + Ventral Tubercle
- Fovea Dentis: articular surface for the dens of the axis on the dorsal surface of the ventral arch
- Ventral Tubercle: prominence on which the longus colli muscles attach
Atlas:
Dorsal Arch –> dorsal tubercle
Dorsal tubercle:
vestige of a spinous process on which the rectus capitis dorsalis minor muscles attach
Atlas:
Transverse Foramen in regards to ruminants and the horse
Not present in the atlas of ruminants, but it is present in the atlas of a horse.
- Intervetebral foramina
- Ventral Lamina
- Caudal costal fovea
Axis:
Dens
The cranial projection from the vertebral body; articulates with the fovea dentis of the atlas.
Axis:
Lateral Vertebral Foramen
Foramen, present in ungulates, that communicates with the vertebral foramen. It transmits the second cervical spinal nerve.
In carnivores, the foramen is replaced by a cranial vertebral notch.
C6 Ventral Lamina
The well-developed sagittal plate of the transverse process of C6. It serves as a radiographic landmark. It is poorly developed in the horse compared to other domestic mammals.
Caudal Costal Fovea
The depressions, one on each side, in the vertebral body of C7 for the heads of the first pair of ribs.
Does C7 include a transverse foramen?
No
- Wing
- Alar foramen
- Lateral vertebral foramen
- Dorsal tubercle
- Transverse foramen
- Dorsal arch
- Cranial articular fovea
- Atlantal fossa
- Ventral tubercle
- Ventral arch
- Vertebral Foramen
- Fovea Dentis
- Caudal articular fovea
Atlas of the Ox
- Lateral vertebral foramen
- Dens
- Cranial articular process
- Transverse process
- Caudal articular process