Lecture 2 Flashcards
Deep Back
- Intermediate layer: errector spinae (Spinalis, Longissimus, Illiocostalis)
- Posterior Rami of Spinal Nerves
- Extend and Laterally flex the spine
Spinal cord anatomy
- Spinal Nerves
- Anterior median fissure
- Posterior median sulcus
- Gray matter vs. white matter
Define: Spinal Nerve
Is a sensory and has mixed functions like sensory and motor
- considered part of peripheral and has ability to heal itself
Define: Dorsal root ganglion
Cell bodies of afferent neurons
Contains Cerebral Spinal Fluid (CSF)
Central Canal
Has myolin, helps with conduction of information
White matter
Is unmyolinayed
Gray matter
Lumbar puncture
Spinal needle is inserted, usually between the 3rd and 4th lumbar vertebrae
How many pairs of Cervical spinal cords do we have?
8
Spinal Meninges
Layers of tissues designed to protect
Contain somatic and visceral sensory
Posterior gray horns
Contains visceral motor neurons, only seen in thoracic section/ region
Lateral gray horns
Contain the axons of interneurons that cross from one side of the cord to the other.
Gray commissures
Surrounds the central canal and contains cell bodies of neurons and glial cells
Gray Matter
Divided into 6 columns, which contain tracts
White Matter
Ascending tracts
relay information from spinal cord to brain, carries sensory information
Descending tracts
carry information from brain to spinal cord, carry motor information
Complete Spinal Cord Injury
No motor/sensory function
Incomplete Spinal Cord Injury
Has some /ambulatory /little motor and sensory
Paraplegia Spinal Cord Injury
Affects legs, injury below cervical region
Quadriplegia Spinal Cord Injury
Affects 4 limbs injured neck
Paresthesia Spinal Cord Injury
Loss of sensation
Paralysis Spinal Cord Injury
Loss of motor functions
Spastic Spinal Cord Injury
Paralysis, still has reflexes and exaggerated spasm
Flaccid Spinal Cord Injury
No reflex/ muscle atrophy
