HEAD NECK
ORBIT NOSE EAR
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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4
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7
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9
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12
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Detailed explanation-1: -The cervical spine, comprised of seven cervical vertebrae referred to as C1 to C7, is divided into two major segments: the craniocervical junction (CCJ) and the subaxial spine. The CCJ includes the occiput and the two most cephalad cervical vertebrae, known as the atlas (C1) and the axis (C2).
Detailed explanation-2: -Cervical nerve 6 controls the extensor muscles of your wrist and is involved in the control of your biceps. C6 provides sensation to the thumb side of your forearm and hand. Cervical nerve 7 controls your triceps and wrist extensor muscles. C7 provides sensation to the back of your arm into your middle finger.
Detailed explanation-3: -The only mammals which have evolved different numbers of neck vertebrae without any apparent problems are sloths and manatees. Two-toed sloths (Choloepus) have 5-7 neck vertebrae while three-toed sloths (Bradypus) have 8 or 9.