Exam 2 Flashcards
How many bones are found in the spinal cord?
31
How many pairs of nerves are found in the spinal cord?
31 PAIRS
What is the outermost layer that provides protection for the spinal cord?
Vertebrae
Which root provides the means through which sensory impulses are conducted?
Dorsal/Posterior root
How many nerves are found in the thoracic region of the spine?
12 pairs
What keeps a neuron’s axon very negative?
An electrical gradient
Where does the spinal cord start?
Medulla oblongata
How does a neurotransmitter enter a neuron?
Through the dendrites
If the axon of a neuron was very positive then all the neurotransmitters would have to be what charge?
Negative
Which root allows for the transmission of motor impulses?
Ventral/Anterior root
What is the main function of the spinal cord?
To send information
The space between the arachnoid and dura mater is known as?
Subdural
What is the inside layer of the meninges called?
PIA mater
What is the purpose of the meninges ?
Provide support & allows cerebrospinal fluid to travel within the spine
Between what layers of the meninges is epidural fluid, space found?
Between the meninges & the vertabrae
Which layer of the meninges is known as the tough mother?
DuraMater
The CX nerves are found where along the spinal cord?
Coccygeal
Most back problems originate from the lower back. What is another name for this region?
Lumbar
What charge are most neurotransmitters?
Positive
List atleast 4 different neurotransmitters
Calcium
Dopamine
Chloride
Sodium
Nerve impulse is the way that ?
The nervous system communicates
Positive charge is also. Known as
Anion
Negative charges are also known as
Cation
Outside of the axon is what charge?
Positively charged
Inside of the axon is what charged?
Negatively charged
Neurotransmitters are stored in?
Vesicles
How long is the spinal cord?
16-18 inches long
How many layers does the meninges have?
3 DuraMater, arachnoid mater, piamater
Space between the meninges and the vertabrae that provides support & cushion
Epidural space
Space Located between the arachnoid and Pia Mater
Subarachnoid space
Define tract
A bundle of nerve fibers located inside the CNS
Define Ganglia
Nerve cells found right outside the CNS
They’re UnMyelAted(no myelin sheaths)
Attaches all the sensory nerves to the spinal cord
Dorsal/posterior root
Attaches all motor nerves to the spinal cord
Ventral/ Anterior Root
Which root is an ascending tract
Dorsal/Posterior
Which root is a descending tract?
Ventral/Anterior Root
C1-C8
Cervical nerves
T1-T12
Thoracic nerves
L1-L5
Lumbar Nerves
S1-S5
Sacral nerves
Pia Mater= delicate mother {Inside layer}
Attaches to the spinal cord & provides bloody supply
Forms a clear thin membranous connective tissue
Arachnoid layer= spider layer {Middle Layer}
Forms delicate fibrous connective tissue
DuraMater=Tough Mother {Outside Layer}
Forms a thought tube of white fibrous connective tissue
