CNS Exam 1 Flashcards
What receptor is found at the muscle tendon junction? A. Muscle Spindle B. Golgi Tendon Organ C. Free nerve ending D. Pacinnian Corpuscle
B. Golgi tendon organ
A bundle of fibers that form a specific tract may also be called a \_\_\_\_\_\_\_. Funiculus Nucleus Fasiculus Gyrus
Fasiculus
In gerneral, ganglia are found in the _____, while groups of neurons in the _____ are called nuclei.
PNS, CNS
Which region of the neural plate forms the peripheral nervous system? Neural Crest Neural tube Neural fold Neural groove
Neural Crest
Which classification of fibers joins one part of the cerebral cortex to another part within the same hemisphere? Association Projection Commissural Cotton
Association
The filum terminale is a remnant of what material? Gray matter Dura matter Arachnoid matter Pia matter
Pia matter
Somatosensory cortex is also called the \_\_\_\_ gyrus. Precentral (motor) Lingual Postcentral Transverse temporal
Postcentral
Which cranial nerve makes the border between the Basilar pons and the middle cerebral peduncle? CN I CN III CN IV CN V
CN IV
Which is a primary brain vesicle? Diencephalon Myelencephalon Telencephalon Rohmbencephalon
Rohmbencephalon
Motor neurons within the ventral horns are examples of \_\_\_\_\_ type neurons? Unipolar Mulltipolar Bipolar Polypolar
Multipolar
What is the most rostral part of the CNS? Spinal ganglion Autonomic ganglion Spinal cord Brain
Brain
All of the following are characteristics of a synapse except ______.
Synapses only occur at the presynaptic axon and postsynaptic dendrite.
The connection between most neurons in the mammalian nervous system is \_\_\_\_\_. The synapse The syncitium A gap junction An initial segment
The synapse
Which axons leave the spinal cord in the ventral root? Somatic sensory Visceral afferent Somatic motor Postganglionic sympathetic
Somatic motor
All of the neurons in the adult are descendants of cells of the embryonic \_\_\_\_\_\_\_. Neural tube Ectoderm Neural crest Mesoderm
Ectoderm
Which of the embryonic brain vesicles contain cells which eventually become the neurons of the cerebral cortex? Telencephalon Diencephalon Myelencephalon Metecephalon
Telencephalon
The medulla is the adult derivative of the \_\_\_\_\_\_. Telencephalon Diencephalon Myelencephalon Metecephalon
Myelencephalon
The main bundle of fibers that connects the cerebral hemispheres to the brainstem and spinal cord are called the crus cerebri or the ______.
Cerebral peduncles
How many neurons participate in stretch reflex such as the knee jerk reflex?
Two
What cortical layer contains Betz cells? Molecular Inner granule Fusiform Inner pyramidal
Inner Pyramidal
Which is not a symptom of spinal nerve root compression? Pain in muscles Ptosis Loss of tendon reflex Motor weakness
Ptosis
In the cerebral hemispheres, inferior and ______ are the same direction.
Ventral
The PNS \_\_\_\_\_\_\_\_\_. Includes the spinal cord Includes cranial nerves Is sheathed in fluid filled spaces Is surrounded by bones
Includes cranial nerves
The brain flexure that develops between the metencephalon and the myelencephalon is the \_\_\_\_\_ flexure. Midbrain Cervical Pontine Cephalic
Pontine
Alpha motor neurons innervate \_\_\_\_\_\_\_. Intrafusal muscle fibers Golgi tendon organs Extrafusal muscel fibers Intervertebral discs
Extrafusal fibers
A recurrent branch of the spinal nerve innervates all of the following except:
Skin of the back
What artery supplies the visual cortex?
Posterior cerebral artery
What artery crosses the corpus callosum?
Anterior cerebral artery
Which microglial cell myelinates the CNS?
Oligodendrocyte