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Unit 2E
Spinal Cord and Meninges
Question | Answer |
---|---|
The area of cell bodies within the CNS | Gray Matter |
The area of axons or fibers within the CNS | White Matter |
What part of the spinal cord arises from the dorsal surface of the spinal cord | Dorsal Root |
The dorsal root ONLY contains ______ neurons | Sensory |
the Enlarged portion of the dorsal root is called the ? | Dorsal Root Ganglion |
an area of cell bodies OUTSIDE of the CNS is called ? | Ganglion |
The dorsal root ganglion contains what ? | Cell bodies of Sensory(afferent) neurons |
What structure arises from the ventral surface of the spinal cord | The Ventral root |
What kind of neurons does the ventral root contain ONLY ? | Motor neurons only |
The ventral root joins the dorsal root joint to form the ? | Spinal nerve |
The spinal nerve divides in to a LARGER _______ Ramus , and SMALLER_____ Ramus | Ventral, Dorsal |
Which ramus supplies the entire anterior trunk as well as the appendages ? | The Ventral Ramus |
Which rams supplies wall the structures of the back ? | The Dorsal Ramus |
The interneuron cell body is in the ? | gray matter |
The interneuron (internuncial) receives impulses from _____ neurons and synapses them to a ______ neuron. | Sensory, motor |
The interneuron also crosses over to the other side of the spinal cord leaving the gray matter and enters the ____ matter and begins to _____ through the spinal cord. | White, Ascend |
the ______ neuron has its cell bodies in the gray mattar of the spinal cord , and its axon passing though the white matter into the ______ root. | Motor(efferent), Ventral |
How many pairs of cervical nerves are there in the spinal cord ? | 8 Pairs |
How many pairs of thoracic nerves are there in the spinal cord ? | 12 pairs |
How many pairs of Sacral nerves are there in the spinal cord ? | 5 Pairs |
How many pairs of Coccygeal nerves are there in the spinal cord ? | 1 pair |
The spinal cord is a long _______ mass of nervous tissue that occupies the upper ____ of the vertebral canal | Cylindrical , 2/3 |
The spinal cord connects to the brain superiorly where it is continuous with the ________, and it extends inferiorly down to the the _____. | medulla, Lumbar vertebrae 2 |
the spinal cord has enlargements in what regions ? | cervical and lumbosacral |
where are cell bodies of the neurons for the upper limb located ? | enlargement of the cervical region |
where are cell bodies of the neurons for the lower limb located ? | enlargement of the lumbosacral region |
Location of CONUS MEDULLARIS | at LV2 |
location of Cauda Equina | below LV2 |
The _____ _____ consists of very long roots of the lower spinal nerves, which descend in a bundle from the _____ _____ | Cauda equina , Conus Medullaris |
The brain and the spinal cord are ______ and ______ by 3 layers of CONNECTIVE tissue, called _______ | Surrounded, Protected, Meninges |
the 3 layers of the meninges , from external to internal are ? | Dura Mater, Arachnoid mater, and Pia mater |
The dura mater is composed of ? | Dense fibrous connective tissue |
The DURA MATER surrounds the _____ and extends through the ______, and courses inferiorly to the ______ in the vertebral canal. | Brain, Foramen Magnum, Coccyx |
The space external to the Dura Mater is termed ? | Epidural Space |
The epidural space contains ______ tissue in the form of globules of ____. The epidural space also contains_____ | Adipose, Fat , Veins |
The Intermediate (middle) meninx is the ? | Arachnoid Mater |
The arachnoid maters structure is a ? | delicate, loose, netlike membrane |
The ARACHNOID MATER surrounds the _____, and extends through the ______, and courses inferiorly to the ______ in the vertebral canal. | Brain, Foramen Magnum, Coccyx (same as dura) |
The Arachnoid mater is separated from the pia mater by the ? | Subarachnoid Space |
The Subarachnoid space contains the ? | CSF |
The Pia mater is the _______ layer of the 3 meninges | Innermost |
the Pia mater's structure ? | VERY delicate connective tissue |
The PIA MATER lies _____ to the surface of the _____ & _____ _____ | directly , Brain, Spinal cord |
The PIA surrounds the _____, and extends through the ______, and courses inferiorly to the ______ in the vertebral canal. | Brain, Foramen Magnum, Coccyx ( they all do) |
How many pairs of Lumbar nerves are there in the spinal cord ? | 5 Pairs |