Spinal Cord Flashcards
Where does the spinal cord start
Inferior to the medulla oblongata
Where does the spinal cord end?
Between L1 L2
Sulcus
Narrow groove
Fissure
Wider groove
Conus medullaris
Thin, conical spinal cord below L enlargement
Cauda Equina
Nerve root extending below the conus medullaris
Filum Terminae
Thin thread of Fibrous Tissue that attaches to the coccygeal ligament
Cervical Enlargement
Nerves for shoulders and limbs
Lumbar enlargement
Nerves for pelvis and lower limbs
Meninges
Membranes that isolate spinal cord from surroundings
Dura matter
The outer layer that is thick and durable and a thin cord
Arachnoid
Spider Webbed layer
Pia Mater
Inner most layer
What is meningitis
Bacteria in the meninges
Where is the epidural space
Between the Dura matter and walls of the vertebrae canal
Contains loose connective tissue and adipose tissue
Where is Cerebrospinal fluid
Circulates in subarachnoid space contains collagen and elastin fiber
Longitudty
Dura matter fuses with periosteum of occipital bone
Laterally
denticulate ligaments connect pia matter
Ventral roots
Contains Axons of Motor Nerves
Dorsal root
Contains axons of sensory nerves
Dorsal root ganglia
Big bulge on the dorsal root
What is Gray Matter made of
Cell bodies dendrites synapses
What is white matter made of
Myelin makes the color Axons of ascending sensory and descending
What are the sections of gray matter
The gray horn: Posterior- Somatic and Visceral sensory Nuclei Anterior- Somatic Motor Nuclei Lateral- Visceral Motor Gray Commissure: Axon crossing
