83. The third and fourth ventricles are linked by the A central canal. B. medull

Question

83. The third and fourth ventricles are linked by the A central canal. B. medulla oblongata. C. pons. D. cerebral aqueduct. 84. The two cerebral hemispheres are separated by the A longitudinal fissure, B. central sulcus. C. lateral sulcus. D. parieto-occipital sulcus. 85. Each of the following are the basal nuclei (ganglia) except one. Identify the exception. A. caudate nucleus B. putamen C. globus pallidus D. hippocampus 86. The limbic system A. consists of a ring of structures that lie between the border between the cerebrum and diencephalon. B. provides a link between the conscious, intellectual functions of the cerebral cortex and the unconscious functions of the brain stem. C. functions in emotion and memory, D. all of the above 87. Cerebrospinal fluid is found between the a. dura mater and vertebrae b. arachnoid and the dura mater c. pia mater and spinal cord d. pia mater and arachnoid 88. The plexus from which the sciatic nerve arises is the a. brachial b. cervical c. lumbar d. sacral

Explanation / Answer

Answer=83]

third & fourth ventricles are linked by

D] cerebral aqueduct

explaination= is present within the mesencephalon or midbrain & contains cerebrospinal fluid (CSF) & connects third ventricle in the diencephalon to the fourth ventricle within the region of the mesencephalon & metencephalon ,located dorsal to pons & ventral to the cerebellum

Answer 84]

Two cerebral hemisphere are separated by

A] Longitudinal fissure

INCORRECT OPTIONS =

A]Central canal = The ventricular system is continuous with the central canal of the spinal cord from the fourth ventricle allowing the flow of CSF to circulate

B]Medula oblongata =is lowest part of brain is connected by the pons to the midbrain

c] pons = is apart of brainstem .it serves as a message station between between several areas of brain

it relays from the cortex & the cerebellum

Answer 84] The cerebral hemisphere are separated by

A] longitudinal fissure

cerebrum is formed by two cerebral hemispheres that are separated by a groove ,the longitudinal fissure

longitudinal fissure is the deep groove

INCORRECT OPTIONS =

B] central sulcus = is a sulcus or fold ,in the cerebral cortex in the brains of vertebrates

c] lateral sulcus = divides both frontal lobe & parietal lobe above from the temporal lobe below

D] Parietoccipital sulcus = present on lateral surface of hemisphere

answer= 85] which of the following are basal nuclei (ganglia) except

D] Hippocampus

explaination = basal ganglia is a group of subcortical nuclei of varied region in the brains of vertebrates including vertebrates which are situated at the brain of forebrain

basal ganglia are interconnected with cerebral cortex ,thallamus

The components of basal ganglia are

Caudate nucleus & putamen ,globus pallidus etc

hippocampus is not a basal nuclei

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