Touch/mechanoreceptors in epidermis.

Peritrichial plexus: Detect touch/movement (around hair follicles).

EncapsulatedNerve endings are enclosed within a specialized connective tissue capsule (Page 26).

Pacinian corpuscles: Detect pressure, vibration.
Meissner's corpuscles: Detect light touch.
Golgi tendon organs: Detect tendon tension.
Neuromuscular spindles: Detect muscle stretch.
Ruffini / Krause's corpuscles: Detect distortion / cold.

19:T41e,

Feature	Cervical	Thoracic	Lumbar	Sacral
Overall Shape	Oval, large (Page 40)	Rounded, small (Pages 41, 43)	Rounded, small (Page 45)	Rounded, smallest (Page 35)
Gray/White Ratio	Gray Matter < White Matter (Page 35)	Gray Matter ≈ White Matter (Page 35)	Gray Matter > White Matter (Page 35)	Gray Matter > White Matter (Page 35)
Gray Horns	Thick anterior (limbs), thin posterior (Page 40)	Thin anterior & posterior; lateral horn present (Pages 41, 43)	Broad anterior (limbs), thick posterior (Page 45)	Thick/fused (Page 35)
Posterior Tracts	Gracile & Cuneate (Page 40)	Gracile & Cuneate (Upper T) / Gracile only (Lower T) (Pages 42, 44)	Gracile only (Page 46)	Gracile only

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Written Quiz

CNS Written 2026