facet joints - 2025 ACF Nationals

Bonus

Radiofrequency ablation, or RFA, uses radio waves emitted by a needle electrode to heat and destroy neurons. For 10 points each:

[10h] RFA can treat disorders in these joints by targeting the medial branch of the dorsal ramus. Back cracking is due to cavitation in these joints, which connect the superior and inferior articular processes on adjacent vertebrae.

ANSWER: facet joints [or zygapophysial joints or zygapophyseal joints or apophyseal joints or Z-joints]

[10e] RFA is a suitable treatment when blocking certain receptors with lidocaine to relieve this sensation. This sensation is transmitted by C-fibers and detected by nociceptors to signal bodily harm.

ANSWER: pain

[10m] RFA can relieve pain from spondylosis, which is a form of this condition that affects the spine. Another form of this condition often treated by DMARDs can result in Z and swan-neck deformities.

ANSWER: arthritis [accept osteoarthritis or rheumatoid arthritis]

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Conversion

Team	Opponent	Part 2	Part 3	Total	Parts
Arizona State	Ottawa	10	0	10	E
Chicago A	WUSTL A	10	10	20	EM
Columbia A	Northwestern	10	10	20	EM
Columbia B	RIT	10	0	10	E
Cornell A	Georgia Tech	10	10	20	EM
Cornell B	Michigan	10	0	10	E
Georgia State	British Columbia	10	10	20	EM
Harvard	Johns Hopkins	10	10	20	EM
Illinois B	Virginia	10	0	10	E
Indiana	Rutgers	10	0	10	E
Iowa State	Minnesota	10	0	10	E
LSE	UC Berkeley B	10	0	10	E
MIT	Chicago B	10	0	10	E
Maryland	North Carolina B	10	0	10	E
NYU	Waterloo B	10	0	10	E
North Carolina A	Stanford	10	0	10	E
Ohio State	Vanderbilt	10	10	20	EM
Penn State	Florida	10	0	10	E
Texas	Toronto C	10	0	10	E
Toronto A	Waterloo A	10	10	20	EM
UC Berkeley A	Illinois A	10	0	10	E
Virginia Tech	Toronto B	10	0	10	E
WUSTL B	Yale	10	10	20	EM
Winona State	UCF	10	10	20	EM

Summary

Tournament	Exact Match?	Heard	PPB	Easy %	Medium %	Hard %
2025 ACF Nationals	Yes	24	13.75	100%	38%	0%