Muscle and Motion

https://en.wikipedia.org/wiki/Kyphosis

"Hunchback"

Kyphosis is an abnormally excessive convex curvature of the spine as it occurs in the thoracic and sacral regions.^[1][2] Abnormal inward concave lordotic curving of the cervical and lumbar regions of the spine is called lordosis. It can result from degenerative disc disease; developmental abnormalities, most commonly Scheuermann's disease; osteoporosis with compression fractures of the vertebra; multiple myeloma; or trauma. A normal thoracic spine extends from the 1st to the 12th vertebra and should have a slight kyphotic angle, ranging from 20° to 45°. When the "roundness" of the upper spine increases past 45° it is called kyphosis or "hyperkyphosis". ....

... High degrees of kyphosis can cause severe pain and discomfort, breathing and digestion difficulties, cardiovascular irregularities, neurological compromise and, in the more severe cases, significantly shortened life spans....

The term is from Greek κυφός kyphos, a hump.

"駝背"

脊柱後凸是脊柱的異常過度的後凸彎曲，發生在胸椎和薦椎區域。[1] [2] 頸椎和腰椎區域異常向內凹稱為前凸。 這可能是因為椎間盤退化引起； 發育異常，最常見的是Scheuermann病； 骨質疏鬆伴椎體壓縮性骨折； 多發性骨髓瘤； 或創傷。 正常的胸椎從第1椎骨到第12椎骨，應具有輕微的後凸角度，範圍從20°至45°。 當上脊椎的“圓度”增加到超過45°時，就稱為脊柱後凸或“駝背”。 ....

高度的後凸畸形會導致嚴重的疼痛和不適，呼吸和消化困難，心血管異常，神經功能受損，在更嚴重的情況下會大大縮短壽命。

該術語來自希臘語κυφόςkyphos（駝峰）。

https://en.wikipedia.org/wiki/Lordosis