Neuro numbers (exam 3) Flashcards
How many myosin molecules make up a myosin filament
200
2 Hz / 2 seconds
4 twitches / 2 seconds
Which nerves does the phrenic nerve originate from?
C3-C5
If you broke these vertebra, you need a vent
C1-C4
The fourth twitch is gone when ___ % of nAch-R are blocked
75-80%
The third twitch is gone when ___ % of nAch-R are blocked
~85
The second twitch is gone when ___ % of nAch-R are blocked
~90
All twitches are gone when ___ % of nAch-R are blocked
95%
What percent of nicotine acetylcholine receptors are blocked when a patient can do a head lift
About 70%
Ballpark range to set your nerve stimulator at
50 to 80 mA
What percent of spinal cord blood flow is supplied by the anterior spinal artery?
75%
What percent of spinal blood flow is provided by the two posterior spinal arteries combined
25%
How many feed vessels are going into the front from the neck?
2
How many feed vessels are in the thorax?
2-3
How many feed vessels are in the lumbar region?
One to two
This artery supplies blood to 2/3 of the lower spinal cord
Great radicular artery or the artery of Adamkiewicz
If you had to pick one level to associate with the great radicular artery, what would it be?
T10
If you had to pick a range for the great radicular artery. What would it be?
T9-T12
What percent of people have their GRA in between T9 and T12?
75%
Absolute range for the GRA
T5 to L5
What percent of your body mass is made up by skeletal muscle?
40%
What percent of your body mass is made up of smooth muscle
10%
How many intercostal arteries do you have?
12
At how many hertz do you reach tetany
40 Hz
