Correct Answer - B
B. i.e. Median nerve
Common causes of median nerve palsy in carpal tunnel are carpal
tunnel syndrome (most common) and Innate dislocation.

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Correct Answer - A
Ans. is 'a' i.e.,Fourth ventricle [Ref Medical Dictionary, 2009
Farlex and Partners]

It is a shallow depression, of a blue color in the fresh brain,
lying laterally in the most rostral portion of the rhomboidal
fossa near the cerebral aqueduct; it lies near the lateral wall of
the fourth ventricle and consists of about 20,000 melaninpigmented neuronal cell bodies the norepinephrine-containing
axons of which have a remarkably wide distribution in the
cerebellum as well as in the hypothalamus and cerebral cortex.
Also called as locus cinereus, locus ferrugineus.

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Correct Answer - C
Ans. is 'c' i.e., Superolateral

I )Upper arm (Deltoid)
5 cm distal to the acromion or
4 cm proximal to the insertion of
deltoid. This is to prevent injury to circumflex humeral nerve.

II Gluteal region
Upper outer (superolateral) quadrant. This is to avoid damage to superior and inferior gluteal vessels and sciatic nerve.

III Thigh (lateral aspect)
(vastus lateralis)
Infant :- Upper lateral quadrant of
thigh below GT
Adult :- Middle third of lateral aspect.

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Correct Answer - B
Ans. is 'b' i.e., Diencephalon

Diancephalon forms - optic cup and stalk, pituitary, thalmus,
hypothalmus, epithalmus, pineal gland (or epiphysis), and 3rd
ventricle (most part).

Retina develops from walls of optic cup.

The outer thinner layer
becomes retinal pigmented epithelium and inner thicker layer forms neural layer of retina.

Forebrain (prosencephalon) consists of telencephalon (anterior or
rostral part) and diencephalon (posterior or caudal part).


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Correct Answer - C
Ans. is 'c' i.e., Pronator teres

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Correct Answer - C
Ans. is'c'i.e., Constrictor pupillae [Ref: Gray's 39h/e p. 7101
Intraocular muscles (intraocular muscles)
→ Intraocular muscles are -

A) Muscles of iris
→ There are two types of muscles in iris that control the size
of pupil:

1. The iris sphinctor or constrictor pupillae (circular muscles):-
These muscles are innervated by the postganglionic parasympathetic fibres from Edinger westphal nucleus via 3'd nerve and ciliary ganglion. These muscles cause constriction of pupil (Miosis).

2. The iris dilator or dilator pupillae (radial muscles) → These
muscles are innervated by sympathetic system via postganglionic sympathetic fibres for the dilator pupillae from
neurons in the superior cervical ganglion. These muscles cause
pupillary dilatation (mydriasis).

B) Ciliary muscles;--> these are innervated by the postganglionic
parasympathetic fibers from EWN via 3rd nerve and ciliary ganglion. These muscles help in accommodation.

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Correct Answer - B
Ans. (B) Right atrium

External features of heart
The heart has following borders and surfaces :-

A) Borders Right border :- Formed by right atrium.
Left border (obtuse margin):- Formed mainly by left ventricle and
partly by left auricle (in its upper most part).
Inferior border (acute margin):- Formed mainly by right ventricle and partly by left ventricle near apex.

Upper border :- Mainly by left atrium and partly by right atrium where SVC enters.
Apex :- Formed by left ventricle.

B) Surfaces
Anterior (sternocostal) surface :- Formed mostly by right ventricle
(major) and right auricle and partly by left ventricle and left auricle.
Inferior (diaphragmatic) surface :- It is formed by left ventricle (left
2/3) and right ventricle (right 1/3). It is traversed by posterior
interventricular groove (PIV) containing PIV branch of RCA

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Correct Answer - A
Ans. is '13' i.e., T4
Trachea bifurcates at carina, at the level of lower border of T4 or
T⁵ disc space.

Structure Cervico thoracic level
Tracheal bifurcation T4-T5

Arch of aorta Begins and ends at T4

Xiphoid process T9

Splenic axis Along 10th rib

Carotid bifurcation, Hyoid bone C3

Upper border of thyroid cartilage C4

Level of cricoids cartilage C6

Lumbar level
Celiac trunk T12 - L I
Superior mesenteric artery Ll
Transpyloric plane Lower border of Ll

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Correct Answer - D
Ans. is 'd' i.e., IV

The gall bladder lies on the inferior surface of the liver closely
related to segment IV or the quadrate lobe.

Anatomically liver is divided into a large right lobe and a small left
lobe by line of attachment of falciform ligament (anterosuperiorly), fissure for ligamentum teres (inferiorly), and fissure for ligamentum
venosum (posteriorly).
Right lobe is much larger and forms five sixth of liver and left lobe forms only one sixth.

Caudate lobe and quadrate lobe are parts of anatomical right lobe.

The physiological left lobe is composed of 4 segments designated Ito IV and is supplied by left branch of hepatic artery, left branch of portal vein and drained by left hepatic duct.

The physiological right lobe consists of segment V, VI, VII and VIII and is supplied by right hepatic artery, right branch of portal vein and drained by right hepatic duct

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Correct Answer - A
Ans. is 'a' i.e., Caudate lobe

Epiploic foramen (foramen of Winslow or aditus to lesser sac) is a slit-like opening through which lesser sac communicates with greater sac.

It is situated at the level of T12 vertebra.

Its boundaries are:-
Anterior:- Right free margin of lesser omentum (contains portal vein, hepatic artery proper and bile duct).
Posterior:- IVC, right suprarenal gland and T12 vertebra.
Superior:- Caudate lobe of the liver.
Inferior:- 1st part of the duodenum and horizontal part of the hepatic
artery

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