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The marked structure is the superior orbital fissure and the oculomotor nerve passes through this fissure. Superior orbital fissure is divided into three compartments by the common tendinous ring. The oculomotor nerve passes through its intermediate compartment.

The left superior intercostal vein drains into the left brachiocephalic vein. Tributaries of the brachiocephalic vein: Left and right internal thoracic veins, Left and right inferior thyroid veins, Left superior intercostal vein.

The muscle marked in the image is the temporalis and its main action is elevation of the mandible. It also helps in the side-to-side grinding movements of the mandible, and posterior fibres help in retraction.

Ligamentum flavum has high levels of elastin fibres.

The ligamenta flava are a series of ligaments that connect the ventral parts of the laminae of adjacent vertebrae. They predominantly contain elastic tissue and form part of the posterior surface of the vertebral canal. The high content of elastin allows it to be stretched by 80 without damage. The ligamentum flava resist separation of the laminae in flexion and assist in extension back to the anatomical position.

Peroneus longus muscle is not involved in the inversion of the foot. It causes eversion and plantar flexion.

Inversion of the foot is a movement in which the medial border of the foot is elevated so that the sole faces medially.

• Tibialis anterior - Causes dorsiflexion and inversion of the foot
• Tibialis posterior - Causes plantar flexion and inversion of the foot
• Extensor hallucis longus - Causes extension of the great toe, dorsiflexion of the foot, and inversion of the foot (minimal action)

Eversion of the foot is a movement where the lateral border of the foot is elevated so that the sole faces laterally. Peroneus longus, peroneus brevis, and peroneus tertius are the muscles involved.

These movements take place, mainly at the talocalcaneal and the talocalcaneonavicular joints, and partly at the transverse tarsal joint.

Lordosis is normally seen in lumbar spine. In adults, the cervical curve is a lordosis, the thoracic curve is a kyphosis, the lumbar curve is also a lordosis, and the pelvic curve is concave anteroinferiorly.

Cartilage is made up of type II collagen. Type I collagen is seen in bone, ligament, tendon, aponeurosis. Type II collagen is in hyaline and elastic cartilage.

The correct pair of lymph nodes and levels among the following options are level 6- Hyoid to clavicle.

Levels of lymph nodes

Level 1a

1b

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Meissner corpuscles are present in the papillary dermis. These corpuscles are rapidly adapting mechanoreceptors particularly sensitive to the movement of objects over the skin's surface and low-frequency vibrations.

The Middle Finger has two Dorsal interossei.

Dorsal Interossei causes abduction of fingers from the Middle/3rd finger.

• Palmar interossei: Adduct fingers toward the center of the third finger.
• Dorsal interossei: Abduct fingers from the center of the third finger.

The structure that divides the liver in Couinaud's classification system is the portal vein.

The structure marked in the image is the oculomotor nerve and it does not supply the superior oblique muscle. Superior oblique muscle is supplied by the trochlear nerve.

All the extraocular muscles are innervated by the oculomotor (III) nerve except:

• Lateral rectus which is supplied by abducens (VI) nerve
• Superior oblique which is supplied by trochlear (IV) nerve

Levator Ani Muscle is not attached to the pelvic brim.

• Origin: Body of the pubis, the arcus tendinous of the levator ani, and the ischial spine.
• Insertion: The coccyx and the anococcygeal raphe or ligament.
• Nerve supply: Branches of the anterior rami of sacral nerves S3 and S4 and the perineal branch of the pudendal nerve.
• Function: Supports and raises the pelvic floor.
• Parts: Consists of the puborectalis, pubococcygeus, and iliococcygeus.

The structure marked in the image is the pyramid containing the pyramidal tracts. A lesion here leads to contralateral hemiplegia.

The structure marked in the image is the ulnar artery, seen contributing to the superficial palmar arch.

It passes deep to the Guyon's canal in the wrist and contributes to the superficial and deep palmar arch.

The structure marked in the image is the radial nerve demonstrated in the cubital fossa.

A lesion of the radial nerve leads to a wrist drop.

• Ape thumb deformity is seen in a lesion of the median nerve.
• Claw hand deformity is seen in a lesion of the ulnar nerve.

The structure marked in red is the ischial spine and the pudendal nerve is related to it.

The pudendal nerve originates from the sacral plexus S2-S4. It exits out of the pelvis by passing through the greater sciatic foramen. It then enters the perineum below the pelvic floor by passing around the ischial spine.

Clinical significance: The ischial spine is used as a landmark for pudendal nerve block.

The structure marked in the image is the dorsal digital expansion of the middle finger. Palmar interossei do not attach to the middle finger and therefore it does not contribute to the dorsal digital expansion of the middle finger.

Palmar interossei are unipennate muscles originating from their own metacarpal bone. Their function is adduction. The middle finger does not need adduction and hence does not have palmar interossei.

Dorsal interossei are bipennate muscles originating from the adjacent metacarpal bone. They attach to the middle three fingers on both sides and do not attach on the thumb and little finger. Their function is abduction. The thumb and little finger have other muscles for abduction.

The lateral 2 lumbricals are unipennate and medial 2 lumbricals are bipennate. Their function is flexion at metacarpophalangeal joints.

The divisions in the brachial plexus do not give any branches.

However, the roots, trunks, and cords of the brachial plexus give out direct branches.

The structure marked 'A' in the diagram is median nerve in the cubital fossa. A lesion of the median nerve causes loss of sensation of the nail of the index finger.

Median nerve cutaneous supply:

• Lateral 2/3rd of the palm by superficial cutaneous branch
• Lateral 3½ fingers (palmar aspect and dorsal aspect of nailbeds) by palmar digital nerves

Contents of cubital fossa: (From medial to lateral) - “MBBR”

• Median nerve
• Brachial artery
• Biceps brachii tendon
• Radial nerve

The marked area in the image of the left kidney is related to the stomach.

Anterior relations of the left kidney:

• Stomach
• Jejunum
• Spleen
• Pancreas
• Splenic vessels
• Splenic flexure and descending colon

The marked structure is the fornix which is supplied by the anterior cerebral artery.

The anteromedial central branches from the anterior cerebral artery supply the fornix along with the optic chiasma, lamina terminalis, hypothalamus, para-olfactory areas, and cingulate gyrus.