Quiz 1 Flashcards
The anterolateral system (also called the Lateral Spinothalamic Tract) of the spinal cord…
is an ascending somatosensory pathway carrying information regarding pain and thermal sensations.
The blood-brain barrier includes
The tight junctions in the endothelial cells that line the capillaries of the central nervous system which prevent most macromolecules from entering or leaving the central nervous system
The outer 2-4 mm of the cortex is made up of gray matter that has been divided into how many horizontal layers?
Six
What is contained in the dorsal root ganglia?
Cell bodies for the sensory axons of the spinal nerves
The fasciculus gracilis and fasciculus cuneatus are located in the…
Dorsal white columns
What is the name of the structure which made from the pia extending through the cauda equina from the conus medullaris to the end of the dural sac around the spinal cord, and anchoring the spinal cord in the area of the the coccyx?
filum terminale
Which of the following is NOT TRUE regarding action potentials?
Action potentials are self-propagating
Action potentials are a local, graded response
Action potentials are frequency-modulated
Action potentials are an all-or-none response
Action potentials are a local graded response
The ABCDE’s of Melanomas give guidance regarding what to look for with relation to a spot on the skin that may be a cancerous melanoma spot. List the ABCDE’s that make a spot suspicious.
A- Asymmetry
B – uneven borders (melanoma) or smooth (benign)
C – color (like brown, tan or black)
D – diameter (larger than 1/4 inch)
E - evolution (changing in size, shape, elevation, color or new symptom)
Pseudo-unipolar cells are found in the ….
Dorsal root fibers with the dorsal root ganglia
Which artery supplies blood to the area of the superior temporal gyrus and lateral fissure, including the area of the primary auditory cortex?
Middle cerebral artery
describe the flow of cerebrospinal fluid
CSF is produced by choroid plexus and flows from the 2 lateral ventricles through the interventricular foramina to the third ventricle and then through the cerebral aqueduct to the fourth ventricle and then out into the subarachnoid space
What is the specific name of the condition caused when there is an occlusion of the foramina of the 4th ventricle resulting in a build-up of CSF within the ventricles that cannot escape into the subarachnoid space to circulate and be reabsorbed?
Noncommunicating hydrocephalus
What type of cells form myelin on the axons in the peripheral nervous system?
schwann cells
What type of cells form myelin on the axons in the CNS
Oligodendrocytes
Briefly describe how the circle of Willis is formed and state the importance or function of the circle of Willis related to the blood supply to the CNS.
The circle of willis forms anastomoses between the internal carotid arteries and the vertebrobasilar system of arteries on the ventral side of the brain. It is made up of:
Anterior cerebral artery (left and right)
Anterior communicating artery
Internal carotid artery (left and right)
Posterior cerebral artery (left and right)
Posterior communicating artery (left and right)
The circle of Willis functions to support and provide blood supply between the anterior and posterior cerebral circulations, serving as backup routes for blood flow if one link is blocked or otherwise compromised. It prevents neurological damage from loss of blood.
