4th Ventricle of Brain: Floor

University:
North Idaho College
Course:
NURS 201 | Fundamentals Of Nursing
Academic year:

2020
Views:

263

Pages:

2
Author:

MichGar

4th Ventride of BrainFLOORRHOMBOD FOSSA)Definition - Anterior wall of 4th ventricle is called Floor Rhomboid fussa)Rhomboidal in shape or Lozenge shaped.Formation -ApeduncleDorsal surface of pons in between 2 superior cerebellarB Once part of Medula Oblongata.Coveringspre-equiduct of gray matter of mid-brain above andCovered by a thick layer of gray matter continued withgray matter around the central canal below.Sulcus:on each side of sulcus. There is a elevation, named asMedian Sulcus :-Dirides the floor into 2 symmetrical halvesmedian eminence bounded laterally.Sulcus Limitens :- Medial eminence bounded by a sulcus laterallyKnown as sulcus limitens.PARTS:- For description purpose floor can be divided into an upperpontine and lower medullary parts by Stria medullarisSriaMedullaris:-Consists of external arcuate fibres and crossed theDIPANKAR RAY floor of 4th ventricle in lateral direction.UPPER PONTINEHuman Anatomy For ExamFacial ColliculusAbove Stria medullaris and an each side of median sulcusthere is a prominence farmed by underlined fibres offacial N. and abducent nucleus, called facial Colliculus.Superior ForeaA depression, Lateral to farial Colliculus.Locus CoeruleusShallow groove extends from upper end of superiorfovea upto lower end of aquiduct. FLOOR OF 4th VentricleDIPANKAR RAYLOWER ME DULLARYCalamus Seriptoris:- the Lower point part of of rhomboid a pen. fossa, resemblingHypoglossal Triangle:- Triangular elevated area, apex of which isdirected downwards at the tips of CalamusScriptoris Subjacent to hypoglossal triangle there are 2 nucle;(i) Medially - Upper part of hypoglossal nucleus (ii) Lakerally - NucleusVagal Triangle:- Dark coloured deepened triangular area lateral intercalatusInferior Foveato hypoglossal triangle.:- A depression, at the appx of Vagal triangle.(directed towards Stria medullans)Funiculus SeparansT-Translueent base ependomal ridge, near theof vagal triangle.Area Prostoma:- Small tongue shaped area between graciletubercle and funiculus separans.Vestibular Area:-(i) 3rd triangular area in the momboid fossa.(ii) Base extend into the pontine part of the floorbelow superior forea.(iii) known Here, it is Crossed by Stra medullar's and presence of tuberdeCochlear as nucleus auditory of tuberde vestibular produced cochclear by the nudeus underlying of dorsalVestibulo coddear Nerve.