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intro to neuroanatomy

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29 Questions

Which structure is responsible for coordinating movement, posture, and balance?

Cortex

How many cranial nerves are present in the human brain?

12

Which part of the nervous system is responsible for transmitting motor signals from the brain to the muscles?

Descending tracts

In the context of motor control, what is the general rule regarding the number of neurons involved in transmitting sensory information to the cortex?

"Three neurons to cortex"

Which area of the brain serves as a 'black box' for sensory and motor information processing?

Cerebellum

What is the exception to the 'Three neurons to cortex' rule in sensory systems?

Olfactory system

Which structure serves as a major CNS pathway connecting the thalamus to the cortex?

Internal capsule

Which descending pathway is responsible for transmitting motor signals from the cortex to the spinal cord?

Corticospinal tract

What structure connects the two hemispheres of the brain for communication?

Corpus callosum

What is the function of the Anterolateral System in the nervous system?

Transmitting pain and temperature sensations

Which pathway is the 2nd major tract from the spinal cord to the thalamus for touch, vibration, and proprioception?

Medial Lemniscus fibers

What is the main function of the Lower part of the pyramids in the nervous system?

Site of crossing fibers

Which structure serves as a 'major highway' for both ascending and descending fibers related to the cerebral cortex?

Internal Capsule

What concept is emphasized by the statement 'RIGHT BRAIN (CORTEX) CONTROLS LEFT SIDE OF BODY AND VICE VERSA'?

Hemispheric lateralization

Match the following with their definitions

CNS = brain and spinal cord PNS = cranial and visceral nerves and ganglia Neurons = neural circuits Glia = oligodendrocytes, astrocytes, microglia

Match the following with their definitions

Corpus callosum = structure that connects the two hemispheres Afferents = carry information to the CNS Efferents = carry information away from the CNS Nucleus = collection of neuronal cell bodies in white matter

Match the following with their definition

Lamina/cortex = when neuronal cell bodies are organized in layers Ganglion = accumulation of neuronal cell bodies in the PNS Nerves = collection of nerve fibers in the PNS Tracts = collection of nerve fibers in the CNS

Match the following with their definition

Pyramids = Corticospinal fibers (from motor cortex to ventral horn in spinal cord) Internal Capsule = ascending fibers going to, and descending fibers coming from the cerebral cortex Crus Cerebri or Cerebral Peduncle = Corticospinal and corticobulbar fibers at the level of the midbrain Anterolateral System = Spinothalamic tract (pain and temperature)

Match the following with their definition

Medial Lemniscus = 2nd major tract from spinal cord to thalamus (touch/vibration/proprioception “TVP” fibers) uses different path (via dorsal columns in spinal cord) Commissure/Decussation = crossing over of nerve tracts from one side to the other tractus = bundle corona = crown

What is the function of the Crus Cerebri or Cerebral Peduncle in the nervous system?

Transmission of corticospinal and corticobulbar fibers

Which structure serves as a 'major highway' for both ascending and descending fibers related to the cerebral cortex?

Internal Capsule

What is the main function of the Anterolateral System in the nervous system?

Transmission of pain and temperature sensations

What is the exception to the general rule known as 'THREE neurons to cortex' in sensory systems?

Medial Lemniscus

Which part of the nervous system is responsible for transmitting motor signals from the brain to the muscles?

Crus Cerebri or Cerebral Peduncle

What concept is emphasized by the statement 'RIGHT BRAIN (CORTEX) CONTROLS LEFT SIDE OF BODY AND VICE VERSA'?

Contralateral organization of motor control

Which structure is responsible for coordinating movement, posture, and balance?

Lower part of pyramids

Which term refers to crossing over of nerve tracts from one side to the other?

Commissure/Decussation

What is the function of the Medial Lemniscus in the nervous system?

Transmission of touch, vibration, and proprioception sensations

What does crossing over at the lower part of pyramids signify in terms of motor control?

Differentiation between upper and lower body control

Block 5 Week 1

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