1) External anatomy of spinal cord Flashcards
In adults, the spinal cord extends from the _____ to the ______. In infants, it extends to ____ or ____
in adults, the spinal cord extends from the medulla oblongata to the superior border of L2. In infants, it extends to L3 or L4
_______ extends from ____ to ____ and contains nerves to and from the arms.
cervical enlargement
c4 to t1
____ extends from __ to ___ and contains nerves to/from the legs.
lumbar enlargement
t9 to t12
What structure is located inferior to the lumbar enlargement, with a tapering, conical structure where the spinal cord terminates?
conus medullaris
what structure arises from the conus medullaris?
filum terminale
What structure is an extension of the pia matter?
filum terminale
What structure anchors the spinal cord to the coccyx?
filum terminale
_____ are paths of communications between the spinal cord and specific regions of the body.
spinal nerevs
Why do spinal nerves appear segmented?
Appear segmented because the 31 pairs of spinal nerves emerge at regular intervals from the intervertebral foramina
Each pair of spinal nerves emerges from a ___ ____
spinal segment
T/F
The naming of the spinal nerves is based on their function.
False - based on segment in which they are located
How many segments are there in the spinal column, and how many nerves do each column contain?
1) 8 pairs of cervical nerves (C1-C8)
2) 12 pairs of thoracic nerves (T1-T12)
3) 5 pairs of lumbar nerves (L1-L5)
4) 5 pairs of sacral nerves (S1-S5)
5) 1 pair of coccygeal nerves (Co1)
How many spinal nerves are there?
31
What structure is considered to be the “horse’s tail”?
cauda equine
This structure is where the nerves of the lumbar, sacral, and coccygeal regions of the spinal cord exit the vertebral column at levels different than where they leave the spinal cord.
cauda equine
