BDS2: Brainstem & Cranial Nerves
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Questions and Answers

Which nucleus is responsible for transmitting painful sensations from the face to the thalamus?

  • Trigeminal spinal nucleus (correct)
  • Trigeminal mesencephalic nucleus
  • Trigeminal motor nucleus
  • Trigeminal principal nucleus

    • Which tract is responsible for transmitting sensory information from the face to the thalamus?

  • Dorsal trigeminothalamic tract
  • Ventral trigeminothalamic tract (correct)
  • Spinal tract of trigeminal nerve
  • Corona radiata

    • Which cranial nerve is responsible for innervating the muscles of facial expression?

  • Vagus nerve (X)
  • Trigeminal nerve (V)
  • Glossopharyngeal nerve (IX)
  • Facial nerve (VII) (correct)

    • What is the result of an upper motor neuron lesion affecting the facial muscles?

    <p>The upper face is spared, while the lower face is affected</p> Signup and view all the answers

    Which gland is NOT innervated by the facial nerve?

    <p>Parotid gland</p> Signup and view all the answers

    What is the result of a lower motor neuron lesion affecting the facial nerve?

    <p>The entire face is affected on one side</p> Signup and view all the answers

    What is the primary function of the reticular formation in the brainstem?

    <p>Arousal and maintenance of consciousness</p> Signup and view all the answers

    Which cranial nerve is responsible for transmitting special sensory information related to the sense of smell?

    <p>Olfactory nerve (C.I)</p> Signup and view all the answers

    What is the main function of the substantia nigra in the brainstem?

    <p>Regulation of movement and coordination</p> Signup and view all the answers

    Which cranial nerve is responsible for transmitting motor signals to the superior oblique muscle?

    <p>Trochlear nerve (C.IV)</p> Signup and view all the answers

    What is the function of the mesencephalic nucleus of the trigeminal nerve?

    <p>Regulation of jaw reflexes</p> Signup and view all the answers

    What is the primary function of the vagus nerve (C.X)?

    <p>Regulation of autonomic functions such as heart rate and blood pressure</p> Signup and view all the answers

    What type of palsy is caused by lesions involving the motor facial nucleus or facial nerve in pons, cranial cavity, middle cavity or on its course of peripheral distribution?

    <p>Peripheral facial palsy</p> Signup and view all the answers

    What is the function of the cochlear branch of the vestibulocochlear nerve?

    <p>Monitoring hearing</p> Signup and view all the answers

    Which nerve is responsible for monitoring blood pCO2 and [H+] levels?

    <p>Glossopharyngeal nerve</p> Signup and view all the answers

    What is the function of the parasympathetic component of the vagus nerve?

    <p>Regulation of heart rate and GIT motility</p> Signup and view all the answers

    Which nerve is responsible for the innervation of the muscles associated with shoulder and head movement?

    <p>Spinal accessory nerve</p> Signup and view all the answers

    What is the characteristic of the vagus nerve?

    <p>It is a mixed sensory and motor nerve</p> Signup and view all the answers

    Which cranial nerve is responsible for the modulation of phonation?

    <p>Vagus nerve (C.X)</p> Signup and view all the answers

    What is the primary function of the nucleus ambiguus?

    <p>Regulation of visceral functions such as swallowing and vomiting</p> Signup and view all the answers

    Which of the following statements about the brainstem is FALSE?

    <p>The brainstem contains only sensory tracts</p> Signup and view all the answers

    What is the primary function of the nucleus tractus solitarius?

    <p>Visceral sensory functions such as taste, pCO2/[H+] monitoring, and gut distension</p> Signup and view all the answers

    Which cranial nerve exits from the ventral surface of the CNS?

    <p>All cranial nerves except the Trochlear nerve (C.IV)</p> Signup and view all the answers

    What is the significance of cranial nerve testing?

    <p>To evaluate the integrity of the entire CNS</p> Signup and view all the answers

    Which part of the brainstem plays a vital life-supporting role?

    <p>Reticular formation</p> Signup and view all the answers

    Which cranial nerve is responsible for transmitting special sensory information related to the sense of taste?

    <p>Glossopharyngeal nerve (C.IX)</p> Signup and view all the answers

    Which of the following is NOT a function of the brainstem?

    <p>Regulation of body temperature</p> Signup and view all the answers

    Which nucleus is responsible for transmitting information related to mastication?

    <p>Motor nucleus</p> Signup and view all the answers

    Which cranial nerve is responsible for innervating the muscles of facial expression?

    <p>Facial nerve (C.VII)</p> Signup and view all the answers

    Which part of the brainstem is responsible for chemoreception?

    <p>Medulla</p> Signup and view all the answers

    Which cranial nerve is responsible for monitoring balance, position, and movement?

    <p>Vestibulocochlear (C.VIII)</p> Signup and view all the answers

    What is the function of the visceral sensory component of the glossopharyngeal nerve?

    <p>Monitoring blood pCO2 and [H+] levels</p> Signup and view all the answers

    Which cranial nerve has a parasympathetic component that regulates heart rate and gastrointestinal motility?

    <p>Vagus (C.X)</p> Signup and view all the answers

    What is the primary function of the spinal accessory nerve?

    <p>Innervation of muscles associated with shoulder and head movement</p> Signup and view all the answers

    Which cranial nerve is responsible for transmitting special sensory information related to hearing?

    <p>Vestibulocochlear (C.VIII)</p> Signup and view all the answers

    What is the characteristic of the vagus nerve?

    <p>A mixed sensory and motor nerve</p> Signup and view all the answers

    What is the primary function of the trigeminal nerve?

    <p>Transmission of sensory information from the face to the thalamus</p> Signup and view all the answers

    What is the difference between an upper motor neuron (UMN) lesion and a lower motor neuron (LMN) lesion affecting the facial muscles?

    <p>UMN lesions affect the upper face, while LMN lesions affect the entire face</p> Signup and view all the answers

    Which nucleus is responsible for transmitting special sensory information from the anterior 2/3 of the tongue?

    <p>Nucleus tractus solitarius</p> Signup and view all the answers

    What is the result of a lesion affecting the corticobulbar fibers?

    <p>Central facial palsy</p> Signup and view all the answers

    Which structure is responsible for transmitting motor signals to the muscles of facial expression?

    <p>Corticobulbar tract</p> Signup and view all the answers

    What is the function of the parasympathetic component of the facial nerve?

    <p>Innervation of the salivary glands</p> Signup and view all the answers

    What is the primary function of the nucleus ambiguus?

    <p>Modulation of phonation</p> Signup and view all the answers

    What is the significance of the 12 pairs of cranial nerves?

    <p>They are mixed nerves that contain motor, sensory, visceral, or parasympathetic components</p> Signup and view all the answers

    What is the primary function of the brainstem?

    <p>Housing the cardiovascular and respiratory centers</p> Signup and view all the answers

    What is the characteristic of the cranial nerves that exit/enter the brainstem?

    <p>They all exit/enter from the ventral surface of the CNS</p> Signup and view all the answers

    What is the significance of the nucleus tractus solitarius?

    <p>It is responsible for transmitting sensory information from the tongue, carotid body, and carotid sinus</p> Signup and view all the answers

    What is the significance of cranial nerve testing?

    <p>It is used to test the integrity of the brainstem and CNS</p> Signup and view all the answers

    What event triggers the formation of the neural plate during embryonic development?

    <p>Inductive signals from the neuroectoderm</p> Signup and view all the answers

    What is the primary component of the mantle layer in the neural tube?

    <p>Neurons and glial cells</p> Signup and view all the answers

    What is the result of the failure of the anterior neuropore to close during embryonic development?

    <p>Anencephaly</p> Signup and view all the answers

    What are the three primary vesicles that form from the cranial end of the neural tube?

    <p>Prosencephalon, Mesencephalon, and Rhombencephalon</p> Signup and view all the answers

    What is the function of the ependymal layer in the neural tube?

    <p>Lining of ventricles</p> Signup and view all the answers

    What is the derivative of the metencephalon in the adult brain?

    <p>Pons and cerebellum</p> Signup and view all the answers

    What is the primary function of the parietal lobe?

    <p>Somatosensory processing</p> Signup and view all the answers

    What is the purpose of the corpus callosum?

    <p>To connect the two cerebral hemispheres</p> Signup and view all the answers

    What is the main characteristic of the cerebral cortex?

    <p>It has a unique pattern of gyri and sulci in each individual</p> Signup and view all the answers

    What is the main function of the temporal lobe?

    <p>Auditory processing and speech</p> Signup and view all the answers

    What is the purpose of the internal capsule?

    <p>To transmit information between the cortex and spinal cord</p> Signup and view all the answers

    What is the primary function of the limbic system?

    <p>To mediate emotional responses, behaviour, drive and memory</p> Signup and view all the answers

    What is the main function of the frontal lobe?

    <p>Motor function</p> Signup and view all the answers

    Which structure connects the hippocampus to the mammillary bodies?

    <p>Fornix</p> Signup and view all the answers

    What is the shape of the lentiform nucleus?

    <p>Lens-shaped</p> Signup and view all the answers

    What is the function of the basal ganglia?

    <p>To mediate higher cognitive processes such as attention, memory and planning</p> Signup and view all the answers

    What is the location of the hippocampus?

    <p>Floor of the lateral ventricle</p> Signup and view all the answers

    What is the collective group of interconnected nuclei located within the subcortical region at the base of forebrain?

    <p>Basal ganglia</p> Signup and view all the answers

    Which meningeal layer lies immediately below the skull and acts as a mechanically protective covering?

    <p>Dura mater</p> Signup and view all the answers

    What is the primary function of the pia mater?

    <p>Supporting the vessels that supply the brain</p> Signup and view all the answers

    What is the purpose of the meningeal partitions?

    <p>To ensure that the brain moves alongside the skull</p> Signup and view all the answers

    Which meningeal partition separates the two cerebral hemispheres?

    <p>Falx cerebri</p> Signup and view all the answers

    What type of tissue makes up the arachnoid mater?

    <p>Non-vascular connective tissue</p> Signup and view all the answers

    What is the relationship between the pia mater and the surface of the brain/spinal cord?

    <p>The pia mater is continuous with the surface of the brain/spinal cord</p> Signup and view all the answers

    What is the name of the partition between the cerebellar hemispheres?

    <p>Falx cerebelli</p> Signup and view all the answers

    What is the name of the sinus that receives blood from the brain and drains into the internal jugular vein?

    <p>Superior sagittal sinus</p> Signup and view all the answers

    What is the name of the bony structure that the upper margin of the falx cerebri attaches to?

    <p>Crista galli</p> Signup and view all the answers

    What is the function of the petrosal sinuses?

    <p>To drain into the internal jugular vein</p> Signup and view all the answers

    What is the name of the partition that sits between the occipital lobes and cerebellar hemispheres?

    <p>Tentorium cerebelli</p> Signup and view all the answers

    What is the result of a lack of valves along the veins of the face and the cavernous sinus?

    <p>Cavernous sinus thrombosis</p> Signup and view all the answers

    What is the result of the failure of the anterior neuropore to close during embryonic development?

    <p>Anencephaly</p> Signup and view all the answers

    What is the primary component of the mantle layer in the neural tube?

    <p>Neurons and glial cells</p> Signup and view all the answers

    What is the result of the failure of the posterior neural tube to close during embryonic development?

    <p>Spina bifida</p> Signup and view all the answers

    What is the origin of the cerebellum?

    <p>Metencephalon</p> Signup and view all the answers

    What is the function of the ependymal layer in the neural tube?

    <p>Lines the ventricles</p> Signup and view all the answers

    What is the primary component of the notochord?

    <p>Mesoderm cells</p> Signup and view all the answers

    Which structure is responsible for mediating higher cognitive processes such as attention, memory, and planning?

    <p>Basal ganglia</p> Signup and view all the answers

    What is the function of the fornix in relation to the hippocampus?

    <p>It connects the hippocampus to the mammillary bodies</p> Signup and view all the answers

    What is the unique shape of the lentiform nucleus?

    <p>Lens-shaped</p> Signup and view all the answers

    In which region of the brain is the basal ganglia located?

    <p>Subcortical region at the base of forebrain</p> Signup and view all the answers

    What is the function of the hippocampus in relation to memory?

    <p>Learning and memory</p> Signup and view all the answers

    What is the anatomical feature of the caudate nucleus?

    <p>It is C-shaped and sits in the wall of lateral ventricle</p> Signup and view all the answers

    What is the location of the hypothalamus in relation to the optic chiasm and mammillary bodies?

    <p>Between the optic chiasm and mammillary bodies</p> Signup and view all the answers

    What are the three regions of the brainstem that contain cranial nerves nuclei?

    <p>Mesencephalon, Pons, and Medulla oblongata</p> Signup and view all the answers

    What are the two main components of the cerebellum?

    <p>Outer gray matter and underlying white matter</p> Signup and view all the answers

    What is the main function of the meninges?

    <p>To protect the brain and spinal cord from injury</p> Signup and view all the answers

    What connects the forebrain to the spinal cord?

    <p>The brainstem</p> Signup and view all the answers

    What is the main function of the cerebellum?

    <p>To coordinate and plan motor movements</p> Signup and view all the answers

    What is the name of the system that comprises one midline, two lateral, a 3rd and 4th ventricles?

    <p>Ventricular system</p> Signup and view all the answers

    Where is cerebrospinal fluid reabsorbed from the ventricles?

    <p>Arachnoid granulations</p> Signup and view all the answers

    What type of hemorrhage occurs when veins in the subdural space rupture?

    <p>Subdural haemorrhage</p> Signup and view all the answers

    What is the result of trauma to the skull that leads to bleeding between the dura mater and skull?

    <p>Epidural haemorrhage</p> Signup and view all the answers

    What is the name of the passageway that connects the 3rd ventricle to the 4th ventricle?

    <p>Cerebral aqueduct</p> Signup and view all the answers

    What is the name of the sinus that is located in the midline of the brain?

    <p>Sagittal sinus</p> Signup and view all the answers

    Which part of the brain is situated around the third ventricle?

    <p>Diencephalon</p> Signup and view all the answers

    What is the primary role of the hypothalamus?

    <p>Maintaining homeostasis</p> Signup and view all the answers

    Which structure connects the two hemispheres of the brain?

    <p>Corpus callosum</p> Signup and view all the answers

    What is the location of the lentiform nucleus in relation to the caudate nucleus?

    <p>Anterior to the caudate nucleus</p> Signup and view all the answers

    What is the function of the thalamus?

    <p>Relaying sensory information to the cortex</p> Signup and view all the answers

    Which structure is responsible for producing melatonin?

    <p>Pineal gland</p> Signup and view all the answers

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