Butterflies also act as a lower member of the food chain. They are a hearty meal for a number of animals, including birds and mice. As populations of butterfly diminish, so will populations of birds and other animals that rely on them as a food source.
The conus medullaris (Latin for medullary cone) is the tapered, lower end of the spinal cord.It occurs near lumbar vertebral levels 1 (L1) and 2 (L2), occasionally lower. The upper end of the conus medullaris is usually not well defined.After the spinal cord tapers out, the spinal nerves continue to branch out diagonally, forming the cauda equina.onus medullaris syndrome is a collection of signs and symptoms associated with injury to the conus medullaris. It typically causes back pain and bowel and bladder dysfunction but weakness and sensory loss is uncommon.
This is particularly true in the lower thoracic spine. For example, a T12 vertebral injury may result in a L2 neurological level. An L1 injury may damage only the conus and sacral segments. An L2 vertebral injury may not damage spinal cord at all and just cause a cauda equina injury. 1  EXAMPLE.2  The most common thoracic spinal cord injury involves T11 and T12 vertebral.or example, a T12 vertebral injury may result in a L2 neurological level. An L1 injury may damage only the conus and sacral segments. An L2 vertebral injury may not damage spinal cord at all and just cause a cauda equina injury. 1  EXAMPLE.