The Second, Third, and Fourth Sacral Segments.
Parasympathetic nerves from the S2, S3 and S4 levels of your spinal cord cause the upper part of your bladder to contract and your bladder neck to relax, assisting in the process of micturition (urination). If these are damaged you will have bladder control problems.
Spinal cord.
Fatigue decreases the excitatory level of the spinal cord
The spinal cord ends at the level of the first lumbar vertebra, which is just below the level of the ribs.
paraplegia
Spinal Reflex
spinal cord
No
This is less likely. You do spinal tapping at L3 to L4 level. Spinal cord ends much above this level. So the system is almost fool proof. You may have bloody tap at times, but is usually harmless.
Spinal cord infarction means that there was some damage to the spinal cord, or the blood supply to the spinal cord, which caused cell death there. Depending on severity and level, this could result in paralysis for the patient.
There will be a complete loss of movement and sensation below the level of spinal cord injury.
Spinal nerves exiting the spinal canal between L4 and S4 collectively make up the sacral plexus.