A&P Spinal Cord, Spinal Nerves, & Meninges
In the spinal cord cross section, the posterior ____ of the gray matter resemble the upper wings of a butterfly.
horns
The gray matter of the spinal cord is divided into anterior, lateral, and posterior ____.
horns
Spinal nerves L4 through S4 form a ____ plexus.
sacral
Epidural space
separates dura mater from bone of vertebra or skull
Arachnoid mater
thin, weblike middle membrane
The spinal cord gives rise to 31 pairs of ____.
spinal nerves
The motor neurons are found in the ____ roots of spinal nerves.
anterior
Cervical spinal nerve pair C1 originates between the occipital bone and the ____.
atlas
Filum terminale
inferior continuation of pia mater to the coccyx
The ____ is a groove that extends the length of the spinal cords posteriorly.
posterior median sulcus
There are ____ pairs of the cervical nerves.
31
There are ____ pairs of sacral spinal nerves.
5
The ____ in the gray commissure of the spinal cord contains cerebrospinal fluid and is continuous with the cavities of the brain.
central canal
The bulge in the spinal cord that gives off nerves to the upper limbs is called the ____ enlargement.
cervical
Denticulate ligaments
connections from pia mater to dura mater that anchor the spinal cord
Subarachnoid space
contains cerebrospinal fluid
The white matter of the spinal cord is divided into anterior, lateral, and posterior ____.
funiculi
The ____ connects the gray matter on the left and right sides of the spinal cord.
gray commissure
The bulge in the spinal cord that gives off nerves to the lower limbs is called the ____ enlargement.
lumbar
Dura mater
outermost layer of meninges