THRC.2 Flashcards
Medulla spinalis is latin for…
Spinal cord
At which locations does the spinal cord become thicker?
Where nerves arise supplying the:
- Forelimb
- Hindlimb
Enlargement of the spinal cord where arising nerves support the forelimb
Intumescentia cervicalis
- Enlargement of the spinal cord where arising nerves support the forelimb
Intumescentia lumbalis
- Enlargement of the spinal cord where arising nerves support the hindlimb
Conus medullaris
- Cone-shaped ending of the spinal cord
Dorsal median groove
Dorsal intermediate groove
Dorsal lateral groove
Dorsal median septum
Dorsal horn
Proper nucleus of the dorsal horn
Ventral horn
Dorsal root
Spongious zone
Gelatinous zone
Thoracic nucleus
Central canal
White matter
Grey matter
Motor nucleus
Ventral root
Ventral median fissure
Dorsal and ventral roots join to form…
Spinal nerves
Spinal ganglia are located…
Inside the dorsal root
Spinal ganglia contain…
Sensory neurones
Except for the first spinal nerve
Cauda equina
- Sacral + caudal spinal roots
- Pass beyond conus medullaris
- Exit through their intervertebral foramen
Conus medullaris
Cauda equina
Blood supply of the spinal cord
Segmental arteries from:
- Vertebral artery (C-spine)
- Cervical arteries
- Dorsal intercostal arteries
- Lumbar arteries
Where do segmental arteries enter the vertebral channel?
Intervertebral foramen
- Then divide into dorsal and ventral branches
- Forming a plexus
Give the arteries of the spinal cord
- Ventral spinal artery
- 2 x dorsal spinal arteries
Where does the venous plexus drain?
- Vertebral vein
- Cranial vena cava
- Azygous vein
Dorsal root
Spinal ganglion
Motor nucleus
Dendritic axon
Motor fibre
