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2 types of afferent fibres that arise from spinal cord and brain-stem are climbing fibres and mossy fibres.
- climbing fibres :
- from contralateral inferior olivary nucleus (in medulla)
- make excitatory synapses directly on purkinje cells
- mossy fibres :
- from all other structures that send fibres to cerebellum (ex. spinal cord)
- influence purkinje cells indirectly through excitatory synapses with granule cells
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What type of fibers make up the posterior and anterior roots of the spinal nerve?
Both Afferent and Efferentboth sensory and motorContains motor & sensory fibers!The spinal cord consists of nerve fibers that are afferent and efferent.
How does habenular nucleus receive its afferent olfactory fibers?
It receives the afferent olfactory fibres via the stria medullaris thalami.
Portion of the brainstem composed of myelinated nerve fibers that connects to the cerebellum?
pons
Which one of the cerebellar peduncles that contains afferent fibers only?
It's the middle cerebellar peduncle.As for superior cerebellar and inferior cerebellar peduncles, they are both contain afferent and efferent fibres.
Nerve fibers that conduct sensory signals to the central nervous system is known as?
Nerves that conduct to the CNS are afferent.
What type of fibers make up the posterior and anterior roots of the spinal nerve?
Both Afferent and Efferentboth sensory and motorContains motor & sensory fibers!The spinal cord consists of nerve fibers that are afferent and efferent.
Synapse site for afferent fibers to sensory cortex?
Thalamus
Are effernet nerve fibers described as motor nerve fibers?
Yes, remember the mnemonic SAME DAVESAME DAVE:sensory is afferent, motor is efferentdorsal is afferent, ventral is efferent
How does habenular nucleus receive its afferent olfactory fibers?
It receives the afferent olfactory fibres via the stria medullaris thalami.
Does the amygdaloid nucleus receive its afferent fibers from the olfactory tract?
Yes!
What serves as a bridge between the brainstem and the cerebellum?
The Pons - The Pons includes a bridge of fibers that connects the brainstem with the cerebellum.
Fibers that connect the cerebral cortex and the cerebellum would be called projection fibers?
There's no question here.
What is an important synapse site for afferent fibers traveling to the sensory cortex?
The thalamus.
What is the fiber type in the dorsal root?
efferent (motor) I'm guessing it's choice B in your packet?
Afferent nerve fibers enter the part of the spinal cord called?
gray commissure
What structure when activated reduces a muscles ability to create force?
Gamma Afferent fibers
What nerve carries only sensory fibers?
nerves carrying just sensory fibers are referred to as sensory and or what nerves?
