AIIMS PG Paper
 

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AIIMS PG entrance exam question paper

Anatomy

1. In the advancement of surgery of shoulder joint, one muscle was not given much importance earlier
but now came in picture, this forgotten muscle of rotator cuff is
a. Subscapularis
b. Supraspinatus
c. Infraspinatus
d. Teres minor
Answer: (a) Subscapularis
Reference:
Explanation:Musculotendinous cuff of shoulder is a fibrous sheath formed by the four flattened tendons
which blend with the capsule of shoulder joint and strengthen it. Muscles which form the cuff arise from
scapula and are inserted into the lesser and greater tubercles of humerus. They are subscapularis, supaspintaous,
infraspinatus and teres minor. There tendons while crossing the shoulder joint become flattened and
blend with each other on one end and with capsule of the joint on the other end, before reaching their points
of insertion.Cuff gives strength to the capsule of shoulder joint all around except inferiorly. That is why dislocation
of humerusoccur most commonly in a down ward insertion.
2. Stuctures at anorectal junction all except
a. External sphincter
b. Internal sphincter
c. Anococcygeal raphe
d. Puborectalis
Answer (c)Anococcygealraphae
Reference: BDC 2nd vol,5/e, pg.414
Explanation: Anorectal ring is a muscular ring present at the anorectal junction. It is formed by the fusion of
the puborectalis, uppermost fibers of external sphincter and internal sphincter. Surgical division of anorectal
ring results in rectal incontinence.
Anococcygeal ligament or anococcygeal raphe is a multilayer musculotendinous structure between anal canal
& hip of coccyx. It is attached anteriorly to the superficial part of external anal sphincter i.e. middle part
of external anal sphincter which lies below to deep part of external anal sphincter at the anorectal junction
present deep part of external anal sphincter.
3. Structure not present at floor of third ventricle- a. Optic stalk
b. Third nerve
c. Infundibulum
d. Mamillary body
Answer: (b) Third nerve (Occulo motor N.)
Reference: BDC 3rdvol, 5/e, pg. 428
Explanation: Third ventricle is a median cleft b/w two thalami. Embryologically it represents the cavity of
diencephalon.
Communication :Antero superiorly, on each side it communicates with the lateral ventricle through the
interventriclar foramen (or Foramen of Monro). Postero inferiorly it communicates with the fourth ventricle
through the Cerebral Aqueduct.
Boundaries:
Anterior wall –
i. Lamina terminalis
ii. Anterior commissure
iii. Anterior columns of fornix
Posterior wall –
i. Pineal body
ii. Post commissure
iii. Cerebral aqueduct
Roof -
i. Ependymal liningof the under surface of telachoroidea of third ventricle.
Floor –
i. Optic chiasma
ii. Tubercinerium
iii. Infndibulum (Pituitary stalk)
iv. Mamillary bodies
v. Posterior perforated substance
vi. Tegmentum of the mid rain
Lateral wall –
i. Medial surface of thalamus
ii. Hypothalamus
iii. Hypothalamic sulcus
Occulomotor N arises at the medial end of crus cerebri of mid brain.So it is not present at the floor of IIIrd
ventricle
4. Which among the following forma a complete cartilaginous ring around tracheobronchial tree- a. Cricoidcartilage
b. Epiglottis
c. Cuneiformcartilage
d. Thyroid cartilage
Answer (a) Cricoids cartilage
Ref: BDC 3rdvol, 5/e pg. 238
Explanation: Cricoid cartilage is shaped like a ring. It encircles the larynx below the thyroid cartilage. The
ring has a narrow anterior part called the arch and a broad posterior part called the lamina. Lamina projects
upwards behind the thyroid cartilage and articulates superiorly with the arytenoids cartilages.
Larynx contains nine cartilages out of which 3 are paired & 3 are unpaired.
Unpaired cartilages
i. Thyroid – V shaped
ii. Cricoids – Ring shaped
iii. Epiglottic – Leaf shaped
Paired cartilages
i. Arytenoids – Pyramid shaped
ii. Corniculate – Small conical shape
iii. Cuneiform – Small rod shape
5. Father of neuro-otology was
a. William House
b. John shea
c. Joseph lampert
d. Not recalled
Answer: (a) William F. HouseInMemorian:
Reference: Wiliam F. House, D.D.S. M.D. the “Father of Neurotology” 1923 – 2012
Explanation: Berlinger, Karen Otology and Neurotology 34 (3): 386 – 387 April 2013
Otology &Neurotology is the name of journal. In which this article has been published available on internet.
6. Vaginal endothelium is derived from:
a. Endoderm of urogenital sinus
b. Mesoderm of urogenital sinus
c. Endoderm of genital ridge
d. Mesoderm of genital ridge
Ans: A, Endoderm of urogenital sinus



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