Baseball Flashcards
What is the throwers paradox?
Balance btwn adequate laxity and sufficient stability
Throwers shoulder:
- Increased ER motion
- Increased IR strength
- Total arc of motion needs to be preserved (often demonstrate a significant loss in IR greater than ER)
What ligament is the primary restraint in the late cocking phase of throwing?
IGHL:
- specifically anterior band of the IGHL
What ligament is often strained with a SLAP lesion?
IGHL:
- specifically superior band of the IGHL
What is “dead arm syndrome”?
What pathology may be present in pitchers?
- Painful shoulder w/ throwing and can no longer throw with pre-injury velocity
- SLAP lesion
Describe the Peel Back Mechanism in a throwing athlete
Late cocking phase
Eccentric follow through stresses on bicep-labral complex
- Inc strain in the late cocking phase may contribute to the detachment of the labrum w/ the eccentric contraction of the biceps muscle that occurs with rapid extension of the elbow
Can create a SLAP lesion
During what phase are the MOST forces imparted to the shoulder?
- deceleration phase
What ossesous adpatation is associated with greater ER ROM and lesser IR ROM?
Greater humeral head retroversion
What dx could cause a pitcher to report “loosing feeling” in his hand?
Cubital tunnel syndrome
- can minimal lateral epicondylitis
- greatest stress during late cocking phase
What pitches generate the greatest forces & torque?
Fastball
Curveball
Slider
Change-Up
What angle is the best to test UCL ligamentous stability?
20-40 deg
What is the moving valgus stress test best for?
- More sensitive than standard valgus stress test
- Good for high-level athletes with a small partial tear of the UCL
What portion of the UCL ligament is the primary restraint to stresses induced by baseball pitching?
Anterior bundle
- primary restraint from 30 - 120 deg of flexion
- subject to near failure tensile stresses during the acceleration phase of throwing
Pitchers 16 years and younger, what are the appropriate number of rest days?
21-40 pitches = ___ rest days
41-60 pitches = ___ rest days
61+ pitches = ____ rest days
21-40 pitches = 1 rest day
41-60 pitches = 2 rest days
61+ pitches = 3 rest days
Tests for SLAP lesions in overhead athletes should mimic the peel back mechanism:
What 5 tests best do this?
♣ Biceps load ♣ Biceps load II ♣ Pronated load ♣ Pain provocation ♣ Resisted supination ER
What elbow angle is best to test ligamentous stability?
20-40 degrees
