Sciatic Nerve Mouse

Hi everyone, i’m ian harvey, massage therapist, and today i’d like to talk about knots. If you’re here, you’ve probably been told by your massage therapist that you have muscle knots. Or, you’re a massage therapist who’s wondering with this whole knot phenomenon is really about. First we’re going to talk about what a not is and what it isn’t and then.

We’re going to get a client on the table and we’ll talk about structures that might feel like knots but they’re not. If you’d like to skip ahead click on the time codes down in the description. First, and, i just want to get this out of the way there is no such thing as knots. There is no corresponding medical term that we could mean when we say knots. Knots are just an idea that massage therapists throw around and that clients receive, and then kind of carry around with them for the.

Rest of their lives if we’re not careful. when your massage therapist told you that you have muscle knots, they meant one of three things. The first possibility is that you have tight postural muscles. They were working on your shoulders, or on your upper back, and they said, wow you’ve got so many knots up here. What they really meant was, I feel muscle tightness. And what they should have said.

Was, wow you’ve got type postural muscles. just like everyone else. In fact, because that’s true why even say anything? I don’t know. To me, it seems like some massage therapists like to make a big deal out of muscle tightness so that they can get people to come back, or so that they can make it seem worthwhile that this person is receiving the massage that they’re receiving. Or.

It’s their opinion that that client has extra tight muscles. Well, I believe that they should keep that opinion to themselves. If you have tight postural muscles, you’ve earned those over years of hard work, of standing, of living your life, and this isn’t something that we need to be pathologizing and acting as if, Oh, this is a problem!.

If you have tight postural muscles and you don’t have pain, then there’s nothing wrong with you. If you do have pain, then this could be contributing. This tightness, this tugofwar between all these muscles. So what your massage therapist should be putting across is that, Hey, you’ve got some tightness up here, but that’s something that can be changed. One, through massage. It’s possible through a series of massages that we can.

Get these muscles to calm down. and, primarily, through your actions. by you changing your habits, such as how our economic is your workstation, are you moving in lots of interesting ways, are you staying active, or are you just doing one task all the time? And there might be some stretches and strengthening things that you could be doing to mellow all this out. So the message I want to get across: If you’ve got tight muscles, then that can.

Change, and it’s likely to change if you make a few alterations to how you’re living your life. The second thing that massage therapists might mean by muscle knots is trigger points. Trigger point theory is that certain areas of your body can refer pain elsewhere and that seems to be well borne out by anecdotal evidence and somewhat by research. But another part of trigger point theory is that there are these little bundles of tightness within larger muscles that.

Spinal Cord External Anatomy 3D Anatomy Tutorial

Hi guys this is peter from anatomyzone and in this tutorial we’re going to take a look at the anatomy of the spinal cord, so to begin with we’ll look at the external features and then we’ll move on to some of the basic internal anatomy of the spinal cord. So what we’re looking at here is a model of the vertebral column containing the spinal cord, and you can see the brainstem at the top. So, rostrally, or at the top, the spinal cord is continuous with the medulla oblongata of the brainstem, and in adults, the spinal cord extends to.

The intervertebral disc between vertebral bodies l1 and l2. so i’ve just zoomed into the lumbar region of the vertebral column, and if I rotate the model round slightly, you can see the distal end of the spinal cord terminating at this level between vertebra L1 and L2. So the spinal cord is essentially a segmental structure, so it consists of 31 segments, you’ve got 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal segment. And these segments give rise to spinal nerves, so you can see the spinal nerves coming off.

Either side of the spinal cord, and the spinal nerves are paired, so you’ve got spinal nerves emerging on either side of the spinal cord. So you’ve got 31 segments of the spinal cord giving rise to 31 pairs of spinal nerves. So just taking a look at the shape of the spinal cord itself, you’ll notice that essentially it’s a cylindrical structure, but there are two areas of the spinal cord which are slightly enlarged, so you’ve got a cervical enlargement and a lumbar enlargement. So I’ve just switched over to a diagram to illustrate this, and.

On the left we’re looking at the anterior aspect of the spinal cord and on the right we’ve got the posterior aspect. So you can see that there’s this bulging out of the spinal cord in the cervical region, and the same in the lumbar region, so the cervical enlargement corresponds to the segment C4T1, the lumbar enlargement corresponds to segments L1 to S3. And it’s in these areas where the nerve plexuses, which innervate the upper and lower limbs respectively, emerge. So this is why that area of the spinal cord is thickened,.

Because a lot of nerves supplying movement in the upper and lower limbs emerge from these areas. So just coming back to the 3D model, we’re taking a look at the distal end of the spinal cord, and you can see that it terminates in this conical structure, which I’ve highlighted in green. And this is known as the conus medullaris. And extending from the tip of the conus medullaris you’ve got a strand of connective tissue, which attaches the conus medullaris to the first coccygeal vertebra, and this strand is called the filum terminale. So I’ve just.

Drawn that on there in yellow. so as you can see the lumbar and sacral spinal nerves kind of hang down from the conus medullaris and they form this kind of arrangement which looks like a horse’s tale, so the Latin for this is cauda equina, and this is what that collection of spinal nerves is known as. So just coming back to this model here with the vertebral column shown, you can see how the pairs of spinal nerves emerge from between the vertebra. So I’m just drawing this on in green, so you can see the 31 pairs of spinal nerves emerging.

From the intervertebral foramina between the vertebra. so let’s just take a look at how the spinal nerves attach to the spinal cord. So what we’re looking at now is the cervical region of the spinal cord, and you can see that I’ve removed one of the cervical vertebra just so we can take a look at how the spinal nerves attach to the spinal cord. So you can see that there’s these little rootlets which are attached to the spinal cord, and these rootlets then converge to form the ventral and dorsal roots. So if I just rotate the.

Model around, you can see that there is a root at the front and a root at the back, so that’s the dorsal root, and these roots converge to form the spinal nerve itself, and the spinal nerve exits the vertebral column via the intervertebral foramina. So immediately after leaving the intervertebral foramina, you can see that there’s another division, so the spinal nerve divides into a ventral and dorsal ramus. So it’s not actually shown clearly on this model here, but the ventral ramus is a lot thicker than the dorsal ramus,.

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