Prof Omid Khaiyat M.D., PhD(@Omid_HopeUni) 's Twitter Profileg
Prof Omid Khaiyat M.D., PhD

@Omid_HopeUni

Professor & Dean of the School of Health & Sport Sciences, Liverpool Hope Uni, Clinical Musculoskeletal/Shoulder Research, Lifetime table tennis player

ID:3253868818

linkhttps://www.linkedin.com/in/professor-omid-khaiyat-78878385/ calendar_today14-05-2015 13:05:34

2,6K Tweets

10,1K Followers

1,0K Following

Follow People
Prof Omid Khaiyat M.D., PhD(@Omid_HopeUni) 's Twitter Profile Photo

Rotator cuff tendinopathy

Tendon👉⤵️ stiffness/increased thickness/ collagen disorganisation

Neuromuscular👉altered kinematics/muscle activation/force

Psychosocial👉depression/anxiety/pain catastrophizing

CNS👉altered pain/sensorimotor processing

journals.sagepub.com/doi/10.1177/17…

Rotator cuff tendinopathy Tendon👉⤵️ stiffness/increased thickness/ collagen disorganisation Neuromuscular👉altered kinematics/muscle activation/force Psychosocial👉depression/anxiety/pain catastrophizing CNS👉altered pain/sensorimotor processing journals.sagepub.com/doi/10.1177/17…
account_circle
Prof Omid Khaiyat M.D., PhD(@Omid_HopeUni) 's Twitter Profile Photo

Exercise induced adaptation on skeletal muscle

Ageing👉🏾muscle fiber atrophy, ⤵️satellite cells (SC) & mitochondrial (Mt) number

Exercise👉🏾reverse negative effects of ageing, muscle fiber hypertrophy, ⤴️ cross section area (CSA), ⤴️SC & Mt number


mdpi.com/2073-4409/7/12…

Exercise induced adaptation on skeletal muscle Ageing👉🏾muscle fiber atrophy, ⤵️satellite cells (SC) & mitochondrial (Mt) number Exercise👉🏾reverse negative effects of ageing, muscle fiber hypertrophy, ⤴️ cross section area (CSA), ⤴️SC & Mt number #muscle mdpi.com/2073-4409/7/12…
account_circle
Prof Omid Khaiyat M.D., PhD(@Omid_HopeUni) 's Twitter Profile Photo

Tendon

a|Tendon👉links muscle to bone via enthesis
b|Type I collagen👉tendon's major structural component
c|Electron microscopy of tendon (mouse tail)
d|Histological staining of tendon fibre (mouse tail)
e|Stained tendon section (mouse Achilles tendon)

nature.com/articles/nrrhe…

Tendon a|Tendon👉links muscle to bone via enthesis b|Type I collagen👉tendon's major structural component c|Electron microscopy of tendon (mouse tail) d|Histological staining of tendon fibre (mouse tail) e|Stained tendon section (mouse Achilles tendon) nature.com/articles/nrrhe…
account_circle
Prof Omid Khaiyat M.D., PhD(@Omid_HopeUni) 's Twitter Profile Photo

Tennis Elbow

▶️Overuse tendinopathy
▶️Annual incidence 👉🏾1%-3%
▶️Most patients in 30s & 40s
▶️maximal tenderness ~1cm distal to epicondyle at origin of extensor carpi radialis brevis
▶️Pain & ⤵️strength with resisted gripping, wrist supination/extension

aafp.org/pubs/afp/issue…

Tennis Elbow ▶️Overuse tendinopathy ▶️Annual incidence 👉🏾1%-3% ▶️Most patients in 30s & 40s ▶️maximal tenderness ~1cm distal to epicondyle at origin of extensor carpi radialis brevis ▶️Pain & ⤵️strength with resisted gripping, wrist supination/extension aafp.org/pubs/afp/issue…
account_circle
Prof Omid Khaiyat M.D., PhD(@Omid_HopeUni) 's Twitter Profile Photo

“Serratus Anterior” muscle

▪️origin👉upper eight ribs
▪️insertion👉medial border of scapula
▪️nerve supply👉lateral & superior thoracic
▪️blood supply👉 thoracodorsal arteries
▪️main action👉protraction of the scapula

ncbi.nlm.nih.gov/books/NBK53145…

“Serratus Anterior” muscle ▪️origin👉upper eight ribs ▪️insertion👉medial border of scapula ▪️nerve supply👉lateral & superior thoracic ▪️blood supply👉 thoracodorsal arteries ▪️main action👉protraction of the scapula #shoulder #scapula ncbi.nlm.nih.gov/books/NBK53145…
account_circle
Prof Omid Khaiyat M.D., PhD(@Omid_HopeUni) 's Twitter Profile Photo

Muscle fibre adaptation to exercise

a/Muscle growth with high or low load training

b/Muscle growth👉epigenetic changes👉muscle memory👉facilitate re-growth

c/Muscle fibre types👉slow/oxidative to fast/glycolytic shift depending on type of training

portlandpress.com/biochemist/art…

Muscle fibre adaptation to exercise a/Muscle growth with high or low load training b/Muscle growth👉epigenetic changes👉muscle memory👉facilitate re-growth c/Muscle fibre types👉slow/oxidative to fast/glycolytic shift depending on type of training portlandpress.com/biochemist/art…
account_circle
Prof Omid Khaiyat M.D., PhD(@Omid_HopeUni) 's Twitter Profile Photo

Tendinopathy (risk factors)

Mechanical👉excessive loading/muscle imbalance, misalignment/training errors

Intrinsic👉past injury/aging/genetics/weight/ hormones/health conditions

Extrinsic👉environmental factors/malnutrition, smoking/alcohol


mdpi.com/1422-0067/21/3…

Tendinopathy (risk factors) Mechanical👉excessive loading/muscle imbalance, misalignment/training errors Intrinsic👉past injury/aging/genetics/weight/ hormones/health conditions Extrinsic👉environmental factors/malnutrition, smoking/alcohol #tendon mdpi.com/1422-0067/21/3…
account_circle
Prof Omid Khaiyat M.D., PhD(@Omid_HopeUni) 's Twitter Profile Photo

'Brachial Plexus': Anatomical course in the shoulder, neck & upper arm

C5/C6 injury👉impaired shoulder & elbow flexion, abduction, external rotation
C7 injury👉compromised dexterity in the hands
C8/T1' injury👉impaired hand/wrist function



frontiersin.org/journals/neuro…

'Brachial Plexus': Anatomical course in the shoulder, neck & upper arm C5/C6 injury👉impaired shoulder & elbow flexion, abduction, external rotation C7 injury👉compromised dexterity in the hands C8/T1' injury👉impaired hand/wrist function #nerve frontiersin.org/journals/neuro…
account_circle
Prof Omid Khaiyat M.D., PhD(@Omid_HopeUni) 's Twitter Profile Photo

Phases of skeletal muscle repair👇

Regeneration/Proinflammatory phase👉infiltration of injury site by immune cells to clear damaged fibres

Restorative phases👉proliferation of multiple cell types & formation/growth of new fibres



nature.com/articles/s4153…

Phases of skeletal muscle repair👇 Regeneration/Proinflammatory phase👉infiltration of injury site by immune cells to clear damaged fibres Restorative phases👉proliferation of multiple cell types & formation/growth of new fibres #muscle #healing nature.com/articles/s4153…
account_circle
Prof Omid Khaiyat M.D., PhD(@Omid_HopeUni) 's Twitter Profile Photo

Normal elbow range of movement 👇🏼

flexion 👉🏾 ~150°
extension 👉🏾 0°
pronation 👉🏾 90°,
supination 👉🏾 90°
hyperextension 👉🏾 10° -15°



sciencedirect.com/science/articl…

Normal elbow range of movement 👇🏼 flexion 👉🏾 ~150° extension 👉🏾 0° pronation 👉🏾 90°, supination 👉🏾 90° hyperextension 👉🏾 10° -15° #elbow #joint sciencedirect.com/science/articl…
account_circle
Prof Omid Khaiyat M.D., PhD(@Omid_HopeUni) 's Twitter Profile Photo

Simplified Shoulder Anatomy (Anterior View)

LHBT: Long head of biceps tendon

SGHL: Superior glenohumeral ligament



semanticscholar.org/paper/Shoulder…

Simplified Shoulder Anatomy (Anterior View) LHBT: Long head of biceps tendon SGHL: Superior glenohumeral ligament #shoulder #anatomy semanticscholar.org/paper/Shoulder…
account_circle
Prof Omid Khaiyat M.D., PhD(@Omid_HopeUni) 's Twitter Profile Photo

The anatomy of tendons & ligaments:

a👉🏼tendon structure at the bone insertion
b👉🏼tendon structure at tissue & molecular levels
c👉🏼anatomy of ligaments (intervertebral disc)



nature.com/articles/s4158…

The anatomy of tendons & ligaments: a👉🏼tendon structure at the bone insertion b👉🏼tendon structure at tissue & molecular levels c👉🏼anatomy of ligaments (intervertebral disc) #tendon #ligament #arthritis #anatomy nature.com/articles/s4158…
account_circle
Prof Omid Khaiyat M.D., PhD(@Omid_HopeUni) 's Twitter Profile Photo

Muscle Cramp (MC)

MC👉a hyper-excitable neurologic phenomena of excessive, involuntary muscle contractions

Common causes👉Physiologic/Metabolic/ Medications/Neuromuscular Disorders/Neurologic Diseases

Pathophysiology underlying neurogenic MC👇

practicalneurology.com/articles/2019-…

Muscle Cramp (MC) MC👉a hyper-excitable neurologic phenomena of excessive, involuntary muscle contractions Common causes👉Physiologic/Metabolic/ Medications/Neuromuscular Disorders/Neurologic Diseases Pathophysiology underlying neurogenic MC👇 practicalneurology.com/articles/2019-…
account_circle
Prof Omid Khaiyat M.D., PhD(@Omid_HopeUni) 's Twitter Profile Photo

Frozen Shoulder: molecular pathophysiology

Systemic/Extrinsic/Intrinsic trigger
⬇️
Pro-inflammatory/Pro-fibrotic Environment
⬇️
Substance P/ Cytokines/ Growth Factors
⬇️
Fibroblast Trans-differentiation to Myofibroblasts
⬇️
Tissue Fibrosis & Contracture

nature.com/articles/s4157…

Frozen Shoulder: molecular pathophysiology Systemic/Extrinsic/Intrinsic trigger ⬇️ Pro-inflammatory/Pro-fibrotic Environment ⬇️ Substance P/ Cytokines/ Growth Factors ⬇️ Fibroblast Trans-differentiation to Myofibroblasts ⬇️ Tissue Fibrosis & Contracture nature.com/articles/s4157…
account_circle
Prof Omid Khaiyat M.D., PhD(@Omid_HopeUni) 's Twitter Profile Photo

Three phases of muscle repair following injury👇🏼

1. Degeneration phase
2. Regeneration phase
3. Remodelling phase



link.springer.com/article/10.100…

Three phases of muscle repair following injury👇🏼 1. Degeneration phase 2. Regeneration phase 3. Remodelling phase #muscle #injury #repair link.springer.com/article/10.100…
account_circle
Prof Omid Khaiyat M.D., PhD(@Omid_HopeUni) 's Twitter Profile Photo

Planes of movements of the shoulder joint👇

▪️Abduction - Adduction
▪️Flexion - Extension
▪️Internal Rotation - External Rotation
▪️Horizontal Adduction - Horizontal Abduction



nature.com/articles/s4157…

Planes of movements of the shoulder joint👇 ▪️Abduction - Adduction ▪️Flexion - Extension ▪️Internal Rotation - External Rotation ▪️Horizontal Adduction - Horizontal Abduction #anatomy #shoulder nature.com/articles/s4157…
account_circle
Prof Omid Khaiyat M.D., PhD(@Omid_HopeUni) 's Twitter Profile Photo

'Non-orthopaedic causes/origins of shoulder pain'

Some examples:
- Aortic Dissection
- Phrenic Nerve
- Cardiac Pain
- Gallstones
- Parsonage-Turner syndrome
- Pulmonary embolism



link.springer.com/chapter/10.100…

'Non-orthopaedic causes/origins of shoulder pain' Some examples: - Aortic Dissection - Phrenic Nerve - Cardiac Pain - Gallstones - Parsonage-Turner syndrome - Pulmonary embolism #shoulder #pain #systemicdiseases #differentialdiagnosis link.springer.com/chapter/10.100…
account_circle
Prof Omid Khaiyat M.D., PhD(@Omid_HopeUni) 's Twitter Profile Photo

Continuum model of Tendinopathy

Healthy Tendon
⬇️
Reactive Tendinopathy (⤴️cellularity, rounded tendon cells, altered gene expression)
⬇️
Tendon Dysrepair (vascular infiltration, collagen disarray)
⬇️
Degenerative Tendinopathy (severe collagen disarray)

ncbi.nlm.nih.gov/pmc/articles/P…

Continuum model of Tendinopathy Healthy Tendon ⬇️ Reactive Tendinopathy (⤴️cellularity, rounded tendon cells, altered gene expression) ⬇️ Tendon Dysrepair (vascular infiltration, collagen disarray) ⬇️ Degenerative Tendinopathy (severe collagen disarray) ncbi.nlm.nih.gov/pmc/articles/P…
account_circle