Question

Which of the following structures is correctly matched to its description?

choroid plexus / a branching network of intersecting nerves

corpus callosum / fibrous tracts of white matter connecting cerebral hemispheres

cerebellar peduncle / a stalk between the cerebrum and pituitary gland

all of the above

Answer 1

OPTION B - corpus callosum / fibrous tracts of white matter connecting cerebral hemispheres

Corpus callosum is a commissural fiber tract of white matter that seperate the cerebrum of the brain into Right and left hemisphere. The commisural fibers in the corpus callosum help to connect the Right nad left hemisphere

The fibers of the corpus callosum are called white matter because the fibers are lined by myelin sheath.it help in the fastest conduction of the impulse by a saltatroy movement.

corpus callosum is divided into Four parts

ROSTRUM: It is anterior most part of the corpus callosum

GENU: rostrum is followed by genu

BODY/TRUNK: it is the part connecting the genu and rostrum

SPLENIUM: posterior most part of the corpus callosum

choroid plexus :it is the plexus of cspillaries present in the ventricle of the cerebrum of brain

Function of choroid plexus is to produce cerebrospinal fluid into the ventrcles and it also act as a barrier to the harmful substance to the brain.

Nerve plexus is the branching network of the intersecting nerves

Eg: Brachial plexus : it is group of nerve innervating the upper limb . it is formed by the nerves from the c5 - T1 cranial nerve root .it combine to form the nerve plexus and release somany branches like radial , ulnar , median , musculocutaneous nerve to the upper limb

3)cerebellar peduncle is the stalk connecting the cerebellum with the brain stem

There are total 3 pair of cerbellar peduncle in our body

They are

superior cerebellar peduncle : these fibers connect the cerebellum with the midbrain

middle cerebellar peduncle :these fibers connect the cerebellum with the pons

inferior cerebellar peduncle :these fibers connect the cerebellum with the medulla

3) a stalk between the cerebrum and pituitary gland is PITUITARY STALK (INFUNDIBULAR STALK)