The longissimus muscle
The longissimus muscle forms the central column of the erector spinae muscle group and is the longest and thickest of this group. It is divided into three regions based on their attachments:
Longissimus capitis
Longissimus cervicis
Longissimus thoracis, which is further subdivided into thoracic and lumbar parts.
Generally speaking, longissimus muscle is a powerful extensor of the vertebral column. However, its exact function depends on the degree of engagement of the different muscle parts. Bilateral contraction of the entire muscle results in extension of the lumbar, thoracic and cervical spine, along with extension of the head and neck. Unilateral contraction of the longissimus muscle results in lateral flexion of the spine on the same side (ipsilaterally). An alternated unilateral contraction of the left and right longissimus aids the walking process by leveling the pelvis and steadying the vertebral column.
-
1:21:17
Redacted News
4 hours ago🚨 BREAKING! BIDEN REPLACEMENT ANNOUNCEMENT COMING, White House in PANIC mode | Redacted News
97.7K176 -
53:44
The Osbournes
5 days ago $1.31 earned50 Cent vs. Trump, 7M Dance Cult Drama, and Sharon's TikTok Spiral
16.9K44 -
1:59:37
Revenge of the Cis
3 hours agoEpisode 1359: Major Disappointment
9.58K8 -
1:01:57
In The Litter Box w/ Jewels & Catturd
21 hours agoBiden FREEZES! | In the Litter Box w/ Jewels & Catturd - Ep. 588 - 6/17/2024
65.9K43 -
7:45
Ignace Aleya
3 days agoI Turned My Car Into A Transformer (challenging Hollywood)
21K7 -
1:27:35
Winston Marshall
2 days agoWho Are More Radical…Populists or The ELITE?! EU Election Breakdown | The Winston Marshall Show #019
33.8K23 -
4:13
OUT OF ORDER
5 hours agoThe Age of Elegance - Season 2
42.5K4 -
1:59:44
Barstool Yak
8 hours agoThe Yak with Big Cat & Co. Presented by Rhoback | The Yak 6-17-24
40K -
53:45
The Kevin Trudeau Show
4 hours agoYour Wish Is Your Command | The Kevin Trudeau Show | Ep. 22
38.1K10 -
1:54:49
Russell Brand
10 hours agoBREAKING: Putin’s Peace Deal REJECTED By NATO! - Stay Free 387
209K536