Lab quiz #4 Flashcards
What structure of the dura mater extends downward into the longitudinal fissure?
Falx Cerebri
Separates the cerebellum from the occipital lobe
Tentorium cerebelli
Where can you find the arachnoid granulations?
Dural Venus sinuses
Name the meninges in order, including spaces and maters from outermost to innermost.
Epidural space, dura mater, Subdural space, arachnoid mater, subarachnoid space, pia mater,
What structure of the spinal cord forms the “tips” of the “butterfly wings”
Posterior gray horn.
What is the function of nuclei in the posterior gray horn?
contains sensory nuclei and receives sensory input
What forms the bridge between the two “wings” of the central canal of the spinal cord?
Posterior gray commissure and Anterior gray commissure.
Describe a Dorsal root shape. Is it sensory, motor, or mixed?
Coming from the CC, has a bulge known as the dorsal root ganglion whereas the other root does not. Sensory
Is the Ventral Root sensory, motor, or mixed?
Motor. No ganglion.
Describe the location of the Sciatic nerve on a human in anatomical position.
Running down the backside of the leg and splitting into the Tibial nerve and Common Fibular nerve near the knee
What is the order of the brachial plexus structures?
Roots - Trunks - Divisions - Cords - Branches
Are the Rami (Both Dorsal and Ventral) sensory, motor, or mixed?
Mixed
Where does the sympathetic ganglion lie?
On the white and gray ramus communicates
What is the Reflex Arc?
Receptor - nerve impulse of Afferent division
or Receptor - spinal cord - interneuron of CNS or Receptor - Spinal cord - motor neuron - muscles of efferent division
What type of Reflex arc is the Monosynaptic Arc?
“Knee Jerk” reaction
What are the Three Trunks of the Brachial Plexus?
Superior, Middle, Inferior.
What are the Three Cords of the Brachial Plexus?
Lateral Cord, Medial Cord, Posterior Cord.
The Ventral Rami of vertebrae C5 fusing with C6 becomes ____?
the Superior Trunk of the Brachial Plexus
The Anterior division of the Superior trunk and the anterior division of the middle trunk of the brachial plexus becomes _______?
The Lateral Cord.
The fusion of vertebrae C8 and T1 becomes _____?
The Inferior trunk of the Brachial Plexus.
The posterior division of the superior trunk and the posterior division of the middle trunk become ___?
The Posterior Cord
The Medial cord is made from the ___
The posterior division of the Inferior trunk of vertebrae C8 and T1.
Vertebrae C7 goes on to becomes the _______?
Middle trunk
Structure of the Brain that divides the Frontal and Parietal Lobes.
Central Sulcus
